/*
 * Libreria global de funciones javascript para Diario Público. Incluye
 * - envioAmigo
 * - aumento de fuente
 * - funciones auxiliares
 * 
 * autor: Fco. Javier Antúnez Ruiz, fjantunez@isotrol.com
 * autor: Miguel J. Jiménez, mjjimenez@isotrol.com
 * 
 * */

/**************************************************************************************************************/

function creaPieBloq () 
{
	var pieBloq = document.createElement('div');
	pieBloq.setAttribute('class', 'pie_bloq');
	pieBloq.className = 'pie_bloq';
	return pieBloq;
}

/**
 * Dice si una dirección de correo-e está bien o mal formada
 */
function comprobarEmail(email)
{
	var er_email = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	return er_email.test(email);
}

function esEdicion()
{
	return false;
} 

var objFuenteLetras = new fuenteLetras();
var	original = 0.8;
var	incremento = 0;

function fuenteLetras () 
{}


/* Función que aumenta la fuente de la letra en todo el contenedor */
fuenteLetras.prototype.aumentarFuente = function () {
	incremento+=.25;
	var tamano = original + incremento;
	document.getElementById("zonaAmpliarTexto1").style.fontSize = tamano + "em";
	if(document.getElementById("zonaAmpliarTexto2"))
	{
		document.getElementById("zonaAmpliarTexto2").style.fontSize = tamano + "em";
	}
}

/* Función que reduce la fuente de la letra en todo el contenedor */
fuenteLetras.prototype.reducirFuente = function ()
{
	incremento-=.25;
	var tamano = original + incremento;
	document.getElementById("zonaAmpliarTexto1").style.fontSize = tamano + "em";
	if(document.getElementById("zonaAmpliarTexto2"))
	{
		document.getElementById("zonaAmpliarTexto2").style.fontSize = tamano + "em";
	}
}


/********************************************** ENVIO AMIGO ***********************************************/

var objEnvioAmigo = new envioAmigo();

function envioAmigo () {}

/*
 * Función que cierra la capa de envio amigo. Recibe dos parámetros
 * urlCaptcha, la url de la que obtener el nuevo captcha id, el id de la imagen
 * a recargar
 */
envioAmigo.prototype.closeEnvioAmigo = function (urlCaptcha, id)
{
	var bloqueo = document.getElementById('capaBloqueo');
	var t = bloqueo.parentNode;
	t.removeChild(bloqueo);
	reemplazarCaptcha(urlCaptcha, id);
	var envioAmigo = document.getElementById('contenedorEnvioAmigo');
	var padre = envioAmigo.parentNode;
	padre.removeChild(envioAmigo);
}

envioAmigo.prototype.comprobarFormulario = function()
{
	// Comprobamos que los campos obligatorios estén rellenos
	
	var vDestino = trim(document.getElementById("destino").value);
	var vTuCorreo = document.getElementById("tuCorreo").value;
	var vInpCaptchaEA = document.getElementById("inpCaptchaEA").value;
	
	if (vDestino == "" || vTuCorreo == "")
	{
		objMensajeAviso.creaAviso('utilidades', 'Debe rellenar los campos obligatorios.', true);
		return false
	}
	if (vInpCaptchaEA == "")
	{
		objMensajeAviso.creaAviso('utilidades', 'Debe introducir el código que aparece para poder mandar la noticia.', true);
		return false
	}
	if (comprobarEmail(vTuCorreo) == false)
	{
		objMensajeAviso.creaAviso('utilidades', 'Su dirección de correo es incorrecta.', true);
		return false
	}
	
	vDestino = vDestino.replace(/\s*\;\s*/g, ";"); // Sustituimos la expresion "; " por ";"
	vDestino = vDestino.replace(/^\;+|\;+$/, "") // Quitamos los ; del principio y del final
	a_vDestino = vDestino.split(";");
	
	for (var i=0; i<a_vDestino.length; i++)
	{
		if (comprobarEmail(a_vDestino[i]) == false)
		{
			objMensajeAviso.creaAviso('utilidades', 'La dirección de destino \'' + a_vDestino[i] + '\' es incorrecta.', true);
			return false
		}
	}
	
	return true; // Si llegamos hasta aquí es que todo es correcto
}

/*
 * Función que crea la capa para el formulario de envio amigo. Recibe como
 * parámetros: logado, con valores true y false según el usuario está logado
 * o no texto1, el texto de titulo de la capa texto2, el texto para la etiqueta
 * de 'direcciones de destino' texto3, el texto para la etiqueta de 'asunto'
 * texto4, el texto para la etiqueta de 'tu dirección de correo' texto5, el
 * texto para la etiqueta de 'tu nombre' texto6, el texto para la etiqueta de
 * 'comentario' texto7, el texto para las normas de uso texto8, el texto para la
 * etiqueta del checkbox 'Enviar también a tu correo ' imgEnviar, la ruta de la
 * imagen que es el botón de enviar idNoticia, la url de la noticia ruta, la
 * sección del articulo titulo, el titulo de la noticia url, la url a la que se
 * envia el formulario basesEstatico, la ruta del directorio estatico
 * urlCaptcha, la ruta de la que obtener el captcha
 */

envioAmigo.prototype.creaEnviaAmigo = function ( idNoticia, ruta, titulo, pagina, bases_estatico, url, urlCaptcha,
	texto1, texto2, texto3, texto4, texto5, texto6, texto7, texto8, imgEnviar)
{	
	/* textos y parametros temporales */
	texto1 = 'Enviar la página por correo a:';
	texto2 = 'Direcciones de destino (*)';
	texto3 = 'Asunto';
	texto4 = 'Su dirección de correo (*)';
	texto5 = 'Su nombre';	
	texto6 = 'Comentario';
	texto7 = "Escriba las direcciones de correo a las que quieres enviar la información separadas por punto y coma (;).<br><br>Los campos marcados con (*) son obligatorios";
	texto8 = 'Enviar también a su correo';
	url = 'impe/enviaAmigo';
	bases_estatico = '/publico/';
	imgEnviar = '/css/cssimg/botonEnvioAmigo.gif';

	var capaBloqueo = document.createElement('div');
	var body = document.getElementsByTagName('body')[0];
	capaBloqueo.id = "capaBloqueo";
	capaBloqueo.className = "estiloBloqueo";
	capaBloqueo.style.height = body.offsetHeight + "px";
	
	/* variable con el nombre del servidor. Puede ser necesario su cambio */
	var servidor = '/publico/';
	

	var pieBloq1 = creaPieBloq();
	var pieBloq2 = creaPieBloq();
	var pieBloq3 = creaPieBloq();
	var pieBloq4 = creaPieBloq();
	
	var inputCaptcha = document.createElement('input');
	var imagenCaptcha = document.createElement('img');
	var recargaCaptcha = document.createElement('input');
	
	imagenCaptcha.src= urlCaptcha;
	imagenCaptcha.id="captchaEA";
	inputCaptcha.className = "inputEnvioAmigoT2";
	inputCaptcha.id = "inpCaptchaEA";
	inputCaptcha.style.width = "90px";
	inputCaptcha.style.verticalAlign = "top";
	inputCaptcha.style.marginLeft = "5px";
	inputCaptcha.setAttribute("name", "codigo");
	recargaCaptcha.className = "botonRecargarT2";
	recargaCaptcha.value = "Recargar";
	recargaCaptcha.onclick = function () 
	{
		reemplazarCaptcha(urlCaptcha, imagenCaptcha.id)
	}
	
	var rutaVar = document.createElement('input');
	rutaVar.setAttribute('type', 'hidden');
	rutaVar.setAttribute('name', 'seccion');
	rutaVar.setAttribute('id', 'seccion');
	rutaVar.setAttribute('value', ruta);
	
	var idNot = document.createElement('input');
	idNot.setAttribute('type', 'hidden');
	idNot.setAttribute('name', 'idNoticia');
	idNot.setAttribute('id', 'idNoticia');
	idNot.setAttribute('value', idNoticia);
	
	var pag = document.createElement('input');
	pag.setAttribute('type', 'hidden');
	pag.setAttribute('name', 'ruta');
	pag.setAttribute('id', 'ruta');
	pag.setAttribute('value', pagina);
	
	var tituloNoticia = document.createElement('input');
	tituloNoticia.setAttribute('type', 'hidden');
	tituloNoticia.setAttribute('name', 'titulo');
	tituloNoticia.setAttribute('id', 'titulo');
	tituloNoticia.setAttribute('value', titulo);
	
	var formatoMail = document.createElement('input');
	formatoMail.setAttribute('type', 'hidden');
	formatoMail.setAttribute('name', 'formato');
	formatoMail.setAttribute('value', "html");
	
	var contenedorEnvioAmigo = document.createElement('div');
	contenedorEnvioAmigo.className = 'contenedorEnvioAmigo';
	contenedorEnvioAmigo.id = 'contenedorEnvioAmigo';
	
	var subcontenedorEnvioAmigo = document.createElement('div');
	subcontenedorEnvioAmigo.className = 'subcontenedorEnvioAmigo';

	var cerrarEnvioAmigo = document.createElement('div');
	cerrarEnvioAmigo.className = 'cerrarEnvioAmigo';
	
	var imgCerrar = document.createElement('img');
	imgCerrar.alt = "cerrar";
	imgCerrar.className = "puntero";
	imgCerrar.src = bases_estatico + '/css/cssimg/xBlancaSobreFondoGris.gif';
	imgCerrar.onclick = function () {objEnvioAmigo.closeEnvioAmigo(urlCaptcha,'captchaComentario');}; // Cerramos y recargamos el captcha de los comentarios
	cerrarEnvioAmigo.appendChild(imgCerrar);
	
	var formEnvioAmigo = document.createElement('form');
	formEnvioAmigo.className = "formEnvioAmigo";
	formEnvioAmigo.id = 'formEnvioAmigo';
	formEnvioAmigo.setAttribute('method', 'get');
	formEnvioAmigo.setAttribute('action', bases_estatico+ url);
	
	var contenidoFormulario = document.createElement('div');
	contenidoFormulario.className = 'contenidoFormulario';
	
	var tituloEnvioAmigo = document.createElement('div');
	tituloEnvioAmigo.className = 'tituloEnvioAmigo';
	tituloEnvioAmigo.innerHTML = texto1;
	
	
/* Elementos de la primera linea */
	var l1b1 = document.createElement('div');
	l1b1.className = 'envioAmigoIzq';
	
	var label1 = document.createElement('label');
	label1.className = 'labelEnvioAmigo';
	label1.setAttribute('for', 'destino');
	label1.innerHTML = texto2;
	var input1 = document.createElement('input');
	input1.className = 'inputEnvioAmigo';
	input1.setAttribute('type', 'text');
	input1.setAttribute('name', 'destino');
	input1.setAttribute('id', 'destino');
	
	l1b1.appendChild(label1);
	l1b1.appendChild(input1);	
	
	var l1b2 = document.createElement('div');
	l1b2.className = 'envioAmigoDrc';
	
	var label2 = document.createElement('label');
	label2.className = 'labelEnvioAmigo';
	label2.setAttribute('for', 'asunto');
	label2.innerHTML = texto3;
	var input2 = document.createElement('input');
	input2.className = 'inputEnvioAmigo';
	input2.setAttribute('type', 'text');
	input2.setAttribute('name', 'asunto');
	input2.setAttribute('id', 'asunto');

	l1b2.appendChild(label2);
	l1b2.appendChild(input2);	

/* Elementos de la segunda linea */
	var l2b1 = document.createElement('div');
	l2b1.className = 'envioAmigoIzq';
	
	var label3 = document.createElement('label');
	label3.className = 'labelEnvioAmigo';
	label3.setAttribute('for', 'tuCorreo');
	label3.innerHTML = texto4;
	var input3 = document.createElement('input');
	input3.className = 'inputEnvioAmigo';
	input3.setAttribute('type', 'text');
	input3.setAttribute('name', 'tuCorreo');
	input3.setAttribute('id', 'tuCorreo');
	
	l2b1.appendChild(label3);
	l2b1.appendChild(input3);	
	
	var l2b2 = document.createElement('div');
	l2b2.className = 'envioAmigoDrc';
	
	var label4 = document.createElement('label');
	label4.className = 'labelEnvioAmigo';
	label4.setAttribute('for', 'tuNombre');
	label4.innerHTML = texto5;
	var input4 = document.createElement('input');
	input4.className = 'inputEnvioAmigo';
	input4.setAttribute('type', 'text');
	input4.setAttribute('name', 'tuNombre');
	input4.setAttribute('id', 'tuNombre');
	
	l2b2.appendChild(label4);
	l2b2.appendChild(input4);
	
/* Elementos de la tercera linea */	
	var l3b1 = document.createElement('div');
	l3b1.className = 'envioAmigoIzq';
	
	var label5 = document.createElement('label');
	label5.className = 'labelEnvioAmigo';
	label5.setAttribute('for', 'comentario');
	label5.innerHTML = texto6;
	
	var area = document.createElement('textarea');
	area.className = 'areaEnvioAmigo';
	area.setAttribute('name', 'comentario');
	area.setAttribute('id', 'comentarioEA');
	
	l3b1.appendChild(label5);
	l3b1.appendChild(area)

	
	var l3b2 = document.createElement('div');
	l3b2.className = 'envioAmigoDrc';
	
	var usoEnvioAmigo = document.createElement('div');
	usoEnvioAmigo.className = 'usoEnvioAmigo';
	usoEnvioAmigo.innerHTML = texto7;
	
	var bloqCheck = document.createElement('div');
	bloqCheck.className = 'bloqCheck';
	
	var input5 = document.createElement('input');
	input5.setAttribute('type', 'checkbox');
	input5.setAttribute('name', 'enviarAMi');
	input5.setAttribute('id', 'enviarAMi');
	
	var label6 = document.createElement('label');
	label6.className = 'labelEnvioAmigo';
	label6.setAttribute('for', 'enviarAMi');
	label6.innerHTML = texto8;
	
	bloqCheck.appendChild(input5);
	bloqCheck.appendChild(label6);
	
	var botonEnvioAmigo = document.createElement('img');
	botonEnvioAmigo.className = 'botonEnvioAmigo';
	botonEnvioAmigo.src = bases_estatico + imgEnviar;
	botonEnvioAmigo.onclick = function (e) {
		if (objEnvioAmigo.comprobarFormulario() == true)	
			objEnvioAmigo.envioCorreo(urlCaptcha, servidor + url + "?" + formEnvioAmigo.serialize());
	};
	
	l3b2.appendChild(usoEnvioAmigo);
	l3b2.appendChild(botonEnvioAmigo);	
	
	
	var l4b1 = document.createElement('div');
	l4b1.className ="envioAmigoIzq margen_sup5px";
	
	l4b1.appendChild(imagenCaptcha);
	l4b1.appendChild(inputCaptcha);
	
	var l4b2 = document.createElement('div');
	l4b2.className ="envioAmigoDrc margen_sup5px";
	
	l4b2.appendChild(recargaCaptcha);
	l4b2.appendChild(botonEnvioAmigo);
	l4b2.appendChild(bloqCheck);

	var br = document.createElement('br');

	
	
/* Reuno todos los elementos */
	contenidoFormulario.appendChild(tituloEnvioAmigo);
	contenidoFormulario.appendChild(l1b1);
	contenidoFormulario.appendChild(l1b2);	
	contenidoFormulario.appendChild(pieBloq1);
	contenidoFormulario.appendChild(l2b1);
	contenidoFormulario.appendChild(l2b2);	
	contenidoFormulario.appendChild(pieBloq2);
	contenidoFormulario.appendChild(l3b1);
	contenidoFormulario.appendChild(l3b2);	
	contenidoFormulario.appendChild(pieBloq3);
	contenidoFormulario.appendChild(l4b1);
	contenidoFormulario.appendChild(l4b2);	
	contenidoFormulario.appendChild(pieBloq4);
	contenidoFormulario.appendChild(idNot);
	contenidoFormulario.appendChild(rutaVar);
	contenidoFormulario.appendChild(pag);	
	contenidoFormulario.appendChild(tituloNoticia);	
	contenidoFormulario.appendChild(formatoMail);
	
	formEnvioAmigo.appendChild(contenidoFormulario);
	
	subcontenedorEnvioAmigo.appendChild(cerrarEnvioAmigo);
	subcontenedorEnvioAmigo.appendChild(formEnvioAmigo);
	
	body.appendChild(contenedorEnvioAmigo);	
	contenedorEnvioAmigo.appendChild(subcontenedorEnvioAmigo);	
	body.appendChild(capaBloqueo);
	
	
	/* cálculo de la altura versión IE */
	if(document.all)
	{
		var posY = (document.body.scrollTop || document.documentElement.scrollTop || 0) 
			+ Math.floor(document.documentElement.clientHeight / 2) - Math.floor(contenedorEnvioAmigo.offsetHeight / 2);
		var posX = Math.floor(document.body.clientWidth  / 2) - Math.floor(contenedorEnvioAmigo.offsetWidth / 2) 
			- (document.body.scrollLeft || document.documentElement.scrollLeft || 0);
		
	}
	/* cálculo de la altura versión Firefox */
	else
	{
		var posY = window.scrollY + Math.floor(window.innerHeight / 2) - Math.floor(contenedorEnvioAmigo.offsetHeight / 2);
		var posX = Math.floor(window.innerWidth / 2) - Math.floor(contenedorEnvioAmigo.offsetWidth / 2) - window.scrollX;
	}	
	
	posY = (posY < 0) ? 0 : posY;
	contenedorEnvioAmigo.style.top = posY + "px";	
	posX = (posX < 0) ? 0 : posX;		
	contenedorEnvioAmigo.style.left = posX + "px";
}

envioAmigo.prototype.envioCorreo = function (urlCaptcha, url, destinos, asunto, tucorreo, tunombre, comentario, enviarami , rutaVar, idNot, pag)
{
new Ajax.Request(url, {   
			/*
			 * parameters:
			 * '?destino='+destinos+'&asunto='+asunto+'&tuCorreo='+tucorreo+'&tuNombre='+tunombre+'&comentario='+comentario+'&enviarAMi='+enviarami+'&seccion='+rutaVar+'&idNoticia='+idNot+'&ruta='+pag ,
			 */
			method: 'get',   
			onSuccess: function(respuesta) 
				{     
					//objEnvioAmigo.closeEnvioAmigo(urlCaptcha, 'captchaComentario' );
					var cadena = respuesta.responseText.toString();
					cadena = trim(cadena);
					var inicio = cadena.indexOf("<error>");
					var fin = cadena.indexOf("</error>");					
					if (inicio != -1 && fin != -1)
					{											
						var mensajeError = cadena.substring (inicio + 7 , fin);
						objMensajeAviso.creaAviso('utilidades', respuesta.responseText, true);		
					}
					else
					{
						objMensajeAviso.creaAviso('utilidades', respuesta.responseText, false);					
					}
					reemplazarCaptcha(urlCaptcha, 'captchaEA');
				}, 
			onFailure: function(respuesta) 
				{     			
					objMensajeAviso.creaAviso('utilidades', respuesta.responseText, true);
					reemplazarCaptcha(urlCaptcha, 'captchaEA');	
				}
		});
}



/********************************************** MENSAJE AVISO ***********************************************/

var objMensajeAviso = new mensajeAviso();

function mensajeAviso () {}

/* Función que cierra la capa de mensajeAviso */
mensajeAviso.prototype.closeMensajeAviso = function ()
{
	
	var bloqueo = document.getElementById('capaBloqueo');
	var padre = bloqueo.parentNode;
	padre.removeChild(bloqueo);
	
	var mensajeAviso = document.getElementById('contenedorMensajeAviso');
	padre = mensajeAviso.parentNode;
	padre.removeChild(mensajeAviso);
}

/*
 * Función que crea la ventana de un aviso. Recibe como parámetros
 * idContenedor, el id de la capa que es referencia para mostrar el mensaje
 * texto, el texto del mensaje tipoAviso, un boolean. Con true significa que el
 * aviso es un error.
 */

mensajeAviso.prototype.creaAviso = function (idContenedor, texto, tipoAviso)
{
	var	bases_estatico = '/publico/';

	var capaBloqueo = document.createElement('div');
	var body = document.getElementsByTagName('body')[0];
	capaBloqueo.id = "capaBloqueo";
	capaBloqueo.className = "estiloBloqueo";
	capaBloqueo.style.height = body.offsetHeight + "px";


	var contenedorMensajeAviso = document.createElement('div');
	contenedorMensajeAviso.className = 'contenedorMensajeAviso';
	contenedorMensajeAviso.id = 'contenedorMensajeAviso';

	var subcontenedorMensajeAviso = document.createElement('div');
	if(tipoAviso == true)
	{
		subcontenedorMensajeAviso.className = 'subcontenedorMensajeAviso';
	}
	else
	{
		subcontenedorMensajeAviso.className = 'subcontenedorMensajeAviso2';
	}
	contenedorMensajeAviso.appendChild(subcontenedorMensajeAviso);

	var xBlancaSobreFondoGris = document.createElement('div');
	xBlancaSobreFondoGris.className = 'xBlancaSobreFondoGris';
	subcontenedorMensajeAviso.appendChild(xBlancaSobreFondoGris);

	var imgCerrar = document.createElement('img');
	imgCerrar.alt = "cerrar";
	imgCerrar.className = "puntero";
	imgCerrar.src = bases_estatico + '/css/cssimg/xBlancaSobreFondoGris.gif';
	imgCerrar.onclick = function () {objMensajeAviso.closeMensajeAviso(); };	
	xBlancaSobreFondoGris.appendChild(imgCerrar);

	var contenidoMensajeAviso = document.createElement('div');
	contenidoMensajeAviso.className = 'contenidoMensajeAviso';
	subcontenedorMensajeAviso.appendChild(contenidoMensajeAviso);

	var tituloContenidoMensajeAviso = document.createElement('div');
	tituloContenidoMensajeAviso.className = 'tituloContenidoMensajeAviso';
	if(tipoAviso == true)
	{
		tituloContenidoMensajeAviso.innerHTML = 'Error';
	}
	contenidoMensajeAviso.appendChild(tituloContenidoMensajeAviso);

	var subtituloContenidoMensajeAviso = document.createElement('div');
	subtituloContenidoMensajeAviso.className = 'subtituloContenidoMensajeAviso';
	contenidoMensajeAviso.appendChild(subtituloContenidoMensajeAviso);

	var mensajeAviso = document.createElement('div');
	mensajeAviso.className = 'mensajeAviso';
	mensajeAviso.innerHTML = texto;
	contenidoMensajeAviso.appendChild(mensajeAviso);
	
	// document.getElementById(idContenedor).appendChild(contenedorMensajeAviso);
	
	
	body.appendChild(capaBloqueo);
		body.appendChild(contenedorMensajeAviso);
	
	/* cálculo de la altura versión IE */
	if(document.all)
	{
		var posY = (document.body.scrollTop || document.documentElement.scrollTop || 0) 
			+ Math.floor(document.documentElement.clientHeight / 2) - Math.floor(contenedorMensajeAviso.offsetHeight / 2);
		var posX = Math.floor(document.body.clientWidth  / 2) - Math.floor(contenedorMensajeAviso.offsetWidth / 2) 
			- (document.body.scrollLeft || document.documentElement.scrollLeft || 0);
		
	}
	/* cálculo de la altura versión Firefox */
	else
	{
		var posY = window.scrollY + Math.floor(window.innerHeight / 2) - Math.floor(contenedorMensajeAviso.offsetHeight / 2);
		var posX = Math.floor(window.innerWidth / 2) - Math.floor(contenedorMensajeAviso.offsetWidth / 2) - window.scrollX;
	}	
		
	posY = (posY < 0) ? 0 : posY;
	contenedorMensajeAviso.style.top = posY + "px";	
	posX = (posX < 0) ? 0 : posX;		
	contenedorMensajeAviso.style.left = posX + "px";
}









/*********************** funciones auxiliares ******************************/

function trim (cadena) {
	var tmp = ltrim(cadena);
	tmp = rtrim (tmp);
	return tmp;
}

function ltrim (cadena) {
	var tmp = cadena.replace(/^\s+/, "");
	return tmp;
}

function reemplazarCaptcha(rutaCaptcha, id)
{
// var contenedor = $('contenedorCaptcha');
	var imagen = document.getElementById(id);
	var nuevaImagen = new Image();
	var rnd = new Date().getTime();
	nuevaImagen.src = rutaCaptcha + "?" + rnd;
	imagen.src = nuevaImagen.src;
	return true;
}

function rtrim (cadena) {
	var tmp = cadena.replace(/\s+$/, "");
	return tmp;
}
function mostrarLoMas(capa, objA)
{
	var c = capa;
	var capa = "loMas_" + capa;
	var objUl = document.getElementById(capa);
	var capaPadre = objUl.parentNode;
	
	var cUl = capaPadre.getElementsByTagName("ul");
	for (var i=0; i<cUl.length; i++)
	{
		cUl[i].style.display="none";
	}
	objUl.removeAttribute("style");
	var listaSolapas = document.getElementById("listaSolapas");
	
	var cA = listaSolapas.getElementsByTagName("a");
	for (var i=0; i<cA.length; i++)
	{
		cA[i].className="";
	}
	
	/*
	 * este parche cambia la visibilidad de los links en función del criterio
	 * elegido
	 */
	
	var aLinks = document.getElementById("linksTitulares").getElementsByTagName("a");
	
	for(var i=0; i<aLinks.length; i++) {
		aLinks[i].style.display = "none";
	}
	
	switch(c) {
		case "leido": document.getElementById("linkTitularesLeidos").style.display = "";
			break;
		case "enviado": document.getElementById("linkTitularesEnviados").style.display = "";
			break;
		case "comentado": document.getElementById("linkTitularesComentados").style.display = "";
			break;
		case "valorado": document.getElementById("linkTitularesValorados").style.display = "";
			break;
	}

	objA.className = "actual";
}


/********************************************** ÚLTIMA HORA **********************************************/

function avanzaUltimaHora(direccion)
{
	if (typeof idIntervaloUltimaHora != "undefined")              
		clearInterval(idIntervaloUltimaHora);
    if (direccion != "+1" && direccion != "-1") direccion = "+1";
    // Vemos qué noticia se está mostrando
    var objSpan = document.getElementById("ultimaHora");
    var cStrong = objSpan.getElementsByTagName("strong");
    for (var i=0; i<cStrong.length; i=i+2)
    {
		if (cStrong[i].style.display == "") {
			break;var er_email = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
		}
    }
    
    var prefijo = "ultima_hora_titulo_";
    var textoId = cStrong[i].getAttribute("id");
    var index = textoId.substring(prefijo.length, textoId.length - 1);

    var index_sig = ""; // Almacena el índice de la siguiente noticia a mostrar
    switch(direccion)
    {
        case "+1":     // Si existe la siguiente mostramos la siguiente y si no volvemos a la primera
	        if (document.getElementById("ultimaHora_titulo_" + (parseInt(index) + 1)) != null)
	            index_sig = parseInt(index) + 1;
	        else
	            index_sig = 0;
	        break;
	   	case "-1":     // Si existe la siguiente mostramos la siguiente y si no volvemos a la Última
	        if (document.getElementById("ultimaHora_titulo_" + (parseInt(index) - 1)) != null)
	            index_sig = parseInt(index) - 1;
	        else
	            index_sig = (cStrong.length / 2) - 1;
	        break;
    }

    cStrong[2 * parseInt(index)].style.display = "none";
    cStrong[2 * parseInt(index) + 1].style.display = "none";
    cStrong[2 * parseInt(index_sig)].style.display = "";
    cStrong[2 * parseInt(index_sig) + 1].style.display = "";
    idIntervaloUltimaHora = setInterval(function(){avanzaUltimaHora(direccion);}, 5000);
}
       
/** ******************************** TITULARES ********************************* */
function getPaginaTitulares(url, pag, per)
{
	var contenedor = document.getElementById('contenedor_titulares');
	
	new Ajax.Request(url, {   
			parameters: '?pag='+pag+'&periodo='+per,
			method: 'get',   
			onSuccess: function(respuesta) 
				{     					
					 contenedor.innerHTML = respuesta.responseText;
				}, 
			onFailure: function(respuesta) 
				{     				
					// alert("Ocurrió un error determinado");
				} 		
		});
}

/********************************************** BUSCADOR ***********************************************/

function buscadorPag () {}

var objBuscadorPag = new buscadorPag();

/*
 * Función que devuelve una página de resultados del buscador
 */
buscadorPag.prototype.getPagina = function (url, parametros)
{
	var contenedor = document.getElementById('contenedorResultadosBuscador');
	
	new Ajax.Request(url, {   
			parameters: '?'+parametros,
			method: 'get',   
			onSuccess: function(respuesta) 
				{     
					contenedor.innerHTML = respuesta.responseText;
				}, 
			onFailure: function(respuesta) 
				{     				
					// alert("Ocurrió un error indeterminado");
				} 		
		});
}

/* Comprueba que f1 sea menor o igual a f2 */
buscadorPag.prototype.compruebaFechas = function(f1,f2)
{
	// Si los campos están "disabled" no hacemos nada
	if (f1.disabled && f2.disabled)
		return true;

	var af1 = f1.value.split("/");
	var af2 = f2.value.split("/");
	
	var df1 = new Date(af1[2], af1[1], af1[0]);
	var df2 = new Date(af2[2], af2[1], af2[0]);
	
	if (df1.getTime() > df2.getTime())
	{
		alert("La fecha del campo 'Hasta' debe ser igual o superior a la fecha del campo 'Desde'.");
		return false;
	}
	
	return true;
}

/*
 * Función que oculta el buscador avanzado
 */
buscadorPag.prototype.ocultaAvanzada = function ()
{
 	var x = document.getElementById('bloqBuscadorAvanzado');
 	
 	document.getElementById("tipo").disabled = true;
 	document.getElementById("s").disabled = true;
 	document.getElementById("finicio").disabled = true;
	document.getElementById("ffin").disabled = true;
 	
 	if (x.style.display != 'none')
	{
 		x.style.display = 'none';
	}
}

/*
 * Función que muestra el buscador avanzado
 */
buscadorPag.prototype.muestraAvanzada = function ()
{
	var x = document.getElementById('bloqBuscadorAvanzado');
	
	document.getElementById("tipo").disabled = false;
	document.getElementById("s").disabled = false;
	document.getElementById("finicio").disabled = false;
	document.getElementById("ffin").disabled = false;
	
 	if (x.style.display == 'none')
	{
 		x.style.display = 'block';
	}
}

/********************************************** MINIGALERIAS ***********************************************/

function miniGalerias () {}

var objMiniGalerias = new miniGalerias();

/*
 * Función que actualiza la mini galeria. Recibe cuatro parámetros
 * idSolapaActivar, es el id de la solapa que indica la galeria que se está
 * viendo. Si vale cadena vacia, no se realiza cambio de solapa activa url, la
 * url a la que se realiza la petición ajax pag, indica la página que se
 * solicita en la petición. Sirve para facilitar la paginación. param, los
 * parámetros de la llamada resetSelect, parámetro booleano que nos indica si
 * debemos resetear el select de las secciones
 */
miniGalerias.prototype.cambiarMGActiva = function (idSolapaActivar, url, param, resetSelect)
{
	new Ajax.Request(url, {   
		parameters: param,
		method: 'get',   
		onSuccess: function(respuesta) 
			{     
				var contenedor = document.getElementById('loMas_galeria');
				contenedor.innerHTML = respuesta.responseText;
				if(idSolapaActivar != '')
				{
					objMiniGalerias.desactivarMG();		
					document.getElementById(idSolapaActivar).className = 'actual';									
				}
				if (resetSelect)
					document.getElementById("selectGaleria").value = "";
			}, 
		onFailure: function(respuesta) 
			{
			} 		
	});
}

/*
 * Función que desactiva las minigalerias
 */
miniGalerias.prototype.desactivarMG = function ()
{
	document.getElementById('gUltimas').className = '';
	document.getElementById('gRecomendadas').className = '';
	document.getElementById('gComentadas').className = '';
	document.getElementById('gVistas').className = '';
}


     
/********************************** ESPECIALES **********************************/

/*
 * Función que carga la sección de Última hora mediante ajax. Recibe tres
 * parámetros url, la dirección url a la que se realiza la petición ajax
 * idContenedor, que es el id del contenedor donde se metera la información
 * urlHora, la url de la que conseguir la hora de servidor en texto plano
 * numColumnas, si el elemento ocupa 2 ó 3 columnas
 */
function getUltimaHora(url, idContenedor, urlHora, numColumnas)
{
	var contenedor = document.getElementById(idContenedor);
	
	new Ajax.Request(url, {   
			parameters: '?numColumnas=' +numColumnas, 
			method: 'get',   
			onSuccess: function(respuesta) 
				{     
					contenedor.innerHTML = respuesta.responseText;
					horaPlana(urlHora);			
				}, 
			onFailure: function(respuesta) 
				{     				
					// alert("Ocurrió un error al cargar bloque Última hora");
				} 		
		});
}

/*
 * Función que devuelve la hora en texto plano
 */
function horaPlana (url) {
	new Ajax.Request(url, {   
			method: 'get',   
			onSuccess: function(respuesta) 
				{     
					var padre = document.getElementById("horaUltimaHora");
					padre.innerHTML = respuesta.responseText;
			
				}, 
			onFailure: function(respuesta) 
				{     				
					// alert("Ocurrió un error al cargar bloque Última hora");
				} 		
		});
}


/*
 * Función para el cambio de solapas y de información del especial "más
 * visto, más enviado". Recibe como parámetro el id de la solapa a marcar.
 * Como resultado marca la solapa e intercambia la capa que se está mostrando
 * por la relacionada con la solicitada.
 */
function cambiarSolapaEspecial(idMarcar)
{
	var listaSolapas = document.getElementById("solapasEspecial");
	var solapas = listaSolapas.getElementsByTagName("li");
	var numSolapas = solapas.length;
	var i=0;
	
	for (i=0; i< numSolapas; i++)
	{		
		
		
		var enlaceActual =  solapas[i].getElementsByTagName('a');
		var idActual = enlaceActual[0].id;
		
		enlaceActual[0].className = "";
		document.getElementById(idActual +"_1").style.display ="none;";
		if (enlaceActual[0].id == idMarcar)
		{
			enlaceActual[0].className = "actual";
			document.getElementById(idActual +"_1").style.display ="block;";
		}
	}	
}


/*
 * Función que carga la sección de Gente ajax. Recibe dos parámetros url, la
 * dirección url a la que se realiza la petición ajax idContenedor, que es el
 * id del contenedor donde se metera la información imagenTop, la imagen que se
 * mostrará en la parte superior del especial paginacion, la pagina que se
 * solicita
 */ 
function getEspecialGente(url, idContenedor, pagina, imagenTop, paginacion)
{
	var numPagina = null;
	var contenedor = document.getElementById(idContenedor);
	if(paginacion == null || paginacion == 'undefined')
	{
		numPagina = 1;	
	}
	else
	{
		numPagina = paginacion;
	}
	new Ajax.Request(url, {   
			parameters: '?id='+pagina+'&imagenTop='+imagenTop+'&pag='+numPagina+'&bloque='+idContenedor, 
			method: 'get',   
			onSuccess: function(respuesta) 
				{     
					contenedor.innerHTML = respuesta.responseText;						
				}, 
			onFailure: function(respuesta) 
				{     				
					// alert("Ocurrió un error al cargar bloque Gente");
				} 		
		});
}


/*
 * Función que carga la sección de Lo más más enviado con ajax. Recibe cinco
 * parámetros url, la dirección url a la que se realiza la petición ajax
 * idContenedor, que es el id del contenedor donde se meterá la información
 */ 
function getEspecialLoMas(url, idContenedor)
{
	var contenedor = document.getElementById(idContenedor);
	new Ajax.Request(url, {   
			parameters: '?bloque='+idContenedor, 
			method: 'get',   
			onSuccess: function(respuesta) 
				{     
					contenedor.innerHTML = respuesta.responseText;						
				}, 
			onFailure: function(respuesta) 
				{     				
					// alert("Ocurrió un error al cargar bloque Lo más");
				} 		
		});
}


/**
 * Abre en una ventana la ampliación de la imagen de una noticia
 */
function abrirAmpliacion(url, titulo, autor, pie, alto, ancho)
{
	var imagen = new Image();
	var pieAncho = 0;
	var altoImagen = 0;
	var anchoImagen = 0;
	var ventanaAmpliacion = null;
	var docAmpliacion = null;
	
	imagen.onload = function()
	{
		altoImagen = imagen.height;
		anchoImagen = imagen.width;		
		
		if (trim(alto) != "")
			alto = parseInt(alto) + 15;
		else
			alto = altoImagen + 15;
			
		if (parseInt(alto) > 0 && trim(pie) != "")
			alto = parseInt(alto) + 80;
			
		if (trim(ancho) != "")
		{
			pieAncho = ancho;
			ancho = parseInt(ancho) + 30;
		}
		else
		{
			pieAncho = anchoImagen;
			ancho = anchoImagen + 30;
		}		
				
		ventanaAmpliacion = window.open('about:blank','', 'height=' + alto + ', width=' + ancho + ',resizable=1,scrollbars=1');
		docAmpliacion = ventanaAmpliacion.document;
		docAmpliacion.write("<html><head><title>PÚBLICO</title></head><body>");
		docAmpliacion.write("<div style=\"width: " + pieAncho + "px;\">");
		docAmpliacion.write("<img src=\"" + url + "\" alt=\"" + titulo + "\">");
		
		if (trim(autor) != "")
			autor = autor + " - ";
		
		docAmpliacion.write("<div style=\"background-color: #F3F3F3; padding: 2px; font-size: 11px; font-family: Arial, Helvetica, sans-serif; font-weight: bold;\">" + autor + pie + "</div>");
		docAmpliacion.write("</div>");
		docAmpliacion.write("</body>");
		docAmpliacion.close();
		
	};
	
	imagen.src = url;
}

function vistaPreviaImpresion(urlVistaPrevia) {
	window.open(urlVistaPrevia,"VistaNoticiaImpresion","resizable=yes,titlebar=yes,scrollbars=yes");
	/*
	 * 3er param puede tener: width/height/top/left/scrollbars/resizable
	 * directories/location/menubar/status/titlebar/toolbar
	 */
}
/**
 * ******************************** INFOUSUARIO*********************************
 */

function InfoUsuario() {}

InfoUsuario.prototype.getHTML = function(url, id) {

	new Ajax.Request(url, {   

			method: 'get',

			onSuccess: function(respuesta) {

				var capa = $(id);

				if (capa) { 
					capa.innerHTML = respuesta.responseText.toString();
				}
				
				var cOpaca = $('opacaAutenticacion');
				if(!!cOpaca) {
					cOpaca.remove();
					$('lineaUsuario').appendChild(cOpaca);
					cOpaca.style.display = 'block';
				}

				var formLogin = $('frm_login');

				if (formLogin) {

					formLogin.onsubmit = function() {
						/*
						 * imposicion cadena nombre usuario no vacia:
						 */
					 	if (trim($('j_username').value) == "")
					 	{
					 		return false;
					 	}
					 	else
					 	{
					 		return true;
					 	}
					}
				}
				try {
					this.tratarFormularioComentarios();
				} catch(e) {
					// No hacemos NADA
				}
				
			}.bind(this),

			onFailure: function(respuesta) {
				objMensaje.creaMensaje(respuesta.responseText);
			}

	});
	
}

InfoUsuario.prototype.tratarFormularioComentarios = function() {

	if ($('autenticacion_nombre') == null) // El usuario no está autentificado

		$('email').parentNode.removeAttribute("style"); // Mostramos el correo
														// electrónico
	else // Usuario autenticado
	{
		/**
		 * esto en público no tiene ningún sentido: -provoca un bloqueo
		 * probablemente relacionado con la validación pues se intenta verificar
		 * sin comprobar que existe. -la entrada 'email' está como 'disabled'
		 * desde Freemarker, si el usuario está autenticado. -además, en la
		 * acción del lado servidor, se coge siempre el email del usuario (de
		 * BD), en caso de estar autenticado.
		 * 
		 * Lo ideal: no tocar la vista aqui. Manipular este problema desde
		 * Freemarker (directamente no poner el HTML del input 'email') y no
		 * validar el campo 'email' para usuarios autenticados al enviar el
		 * formulario, pues no existe.
		 */
		// $('email').parentNode.parentNode.removeChild($('email').parentNode);
		// // Eliminamos la capa que pide el correo electrónico

		// A continuación rellenamos el nombre de usuario

		$('nombre').value = $('autenticacion_nombre').innerHTML + " " + $('autenticacion_apellidos').innerHTML;
	}
}

objInfoUsuario = new InfoUsuario();

/******************************** FIN INFOUSUARIO **********************************/


/********************************** ARCHIVO **********************************/
function getPaginaArchivo(url, pag, fecha)
{
	var contenedor = document.getElementById('contenedor_archivo');
	
	new Ajax.Request(url, {   
			parameters: '?pag='+pag+fecha,
			method: 'get',   
			onSuccess: function(respuesta) 
				{     					
					 contenedor.innerHTML = respuesta.responseText;
					 contenedor.innerHTML.evalScripts();
				}, 
			onFailure: function(respuesta) 
				{     				
					// alert("Ocurrió un error determinado");
				} 		
		});
}

/**
 * PERFIL USUARIO
 */

/**
 * invocada cuando el usuario pincha en 'Cambiar contraseña'. Muestra los campos
 * para cambiar su contrasena actual, y fija el valor del campo oculto
 * 'cambiar_contrasena' a 'true'
 */
function cambioContrasena() {
	var dContrasena = $('dContrasena');
	if(dContrasena.style['display']=="none") {
		// mostrar
		dContrasena.style['display'] = "";
		$('cambiar_contrasena').value='true';
		$('lCambiarContrasena').innerHTML='-No cambiar contrase&ntilde;a';
	} else {
		// ocultar
		dContrasena.style['display'] = "none";
		$('cambiar_contrasena').value='false';
		$('lCambiarContrasena').innerHTML='+Cambiar contrase&ntilde;a'
	}
}

function validarFormularioPerfil() {
	if($('identificador_').value=='')
		return false;
	if($('cambiar_contrasena').value=='true') {
		var contrasena_nueva = $('contrasena_nueva_').value;
		var contrasena_nueva_repetida = $('contrasena_nueva_repetida_').value;
		if( contrasena_nueva=='' 
			|| contrasena_nueva != contrasena_nueva_repetida)
			return false;
	}
	if($('nombre_').value=='')
		return false;
	if($('apellidos_').value=='')
		return false;
	if($('email_').value=='')
		return false;
	return true;
}


/*
 * Fichero para sobreescibir métodos de libreriaGlobal.js
 * 
 * autor: Fco. Javier Antúnez Ruiz, fjantunez@isotrol.com
 * autor: Miguel J. Jiménez, mjjimenez@isotrol.com
 * 
 * */

var baseEstaticoEspecifico = '/';
var baseImpeEspecifico = '';
var baseRecursosEspecifico = 'http://files.publico.es/resources/';

/**************************************************************************************************************/


/*Función que crea la capa para el formulario de envio amigo. Recibe como parámetros:
 * logado, con valores true y false según el usuario está logado o no
 * texto1, el texto de titulo de la capa
 * texto2, el texto para la etiqueta de 'direcciones de destino'
 * texto3, el texto para la etiqueta de 'asunto'
 * texto4, el texto para la etiqueta de 'tu dirección de correo'
 * texto5, el texto para la etiqueta de 'tu nombre'
 * texto6, el texto para la etiqueta de 'comentario'
 * texto7, el texto para las normas de uso
 * texto8, el texto para la etiqueta del checkbox 'Enviar también a tu correo '
 * imgEnviar, la ruta de la imagen que es el botón de enviar
 * idNoticia, la url de la noticia
 * ruta, la sección del articulo
 * titulo, el titulo de la noticia
 * url, la url a la que se envia el formulario
 * basesEstatico, la ruta del directorio estatico
 * urlCaptcha, la ruta de la que obtener el captcha
 * */

envioAmigo.prototype.creaEnviaAmigo = function ( idNoticia, ruta, titulo, pagina, bases_estatico, url, urlCaptcha,
	texto1, texto2, texto3, texto4, texto5, texto6, texto7, texto8, imgEnviar)
{	
	/*textos y parametros temporales*/
	texto1 = 'Enviar la página por correo a:';
	texto2 = 'Direcciones de destino (*)';
	texto3 = 'Asunto';
	texto4 = 'Su dirección de correo (*)';
	texto5 = 'Su nombre';	
	texto6 = 'Comentario';
	texto7 = "Escriba las direcciones de correo a las que quieres enviar la información separadas por punto y coma (;).<br><br>Los campos marcados con (*) son obligatorios";
	texto8 = 'Enviar también a su correo';
	url = 'impe/enviaAmigo';
	bases_estatico = '/publico/';
	imgEnviar = '/css/cssimg/botonEnvioAmigo.gif';

	var capaBloqueo = document.createElement('div');
	var body = document.getElementsByTagName('body')[0];
	capaBloqueo.id = "capaBloqueo";
	capaBloqueo.className = "estiloBloqueo";
	capaBloqueo.style.height = body.offsetHeight + "px";
	
	/*variable con el nombre del servidor. Puede ser necesario su cambio*/
	var servidor = '/publico/';
	

	var pieBloq1 = creaPieBloq();
	var pieBloq2 = creaPieBloq();
	var pieBloq3 = creaPieBloq();
	var pieBloq4 = creaPieBloq();
	
	var inputCaptcha = document.createElement('input');
	var imagenCaptcha = document.createElement('img');
	var recargaCaptcha = document.createElement('input');
	
	imagenCaptcha.src= urlCaptcha;
	imagenCaptcha.id="captchaEA";
	inputCaptcha.className = "inputEnvioAmigoT2";
	inputCaptcha.id = "inpCaptchaEA";
	inputCaptcha.style.width = "90px";
	inputCaptcha.style.verticalAlign = "top";
	inputCaptcha.style.marginLeft = "5px";
	inputCaptcha.setAttribute("name", "codigo");
	recargaCaptcha.className = "botonRecargarT2";
	recargaCaptcha.value = "Recargar";
	recargaCaptcha.onclick = function () 
	{
		reemplazarCaptcha(urlCaptcha, imagenCaptcha.id)
	}
	
	var rutaVar = document.createElement('input');
	rutaVar.setAttribute('type', 'hidden');
	rutaVar.setAttribute('name', 'seccion');
	rutaVar.setAttribute('id', 'seccion');
	rutaVar.setAttribute('value', ruta);
	
	var idNot = document.createElement('input');
	idNot.setAttribute('type', 'hidden');
	idNot.setAttribute('name', 'idNoticia');
	idNot.setAttribute('id', 'idNoticia');
	idNot.setAttribute('value', idNoticia);
	
	var pag = document.createElement('input');
	pag.setAttribute('type', 'hidden');
	pag.setAttribute('name', 'ruta');
	pag.setAttribute('id', 'ruta');
	pag.setAttribute('value', pagina);
	
	var tituloNoticia = document.createElement('input');
	tituloNoticia.setAttribute('type', 'hidden');
	tituloNoticia.setAttribute('name', 'titulo');
	tituloNoticia.setAttribute('id', 'titulo');
	tituloNoticia.setAttribute('value', titulo);
	
	var formatoMail = document.createElement('input');
	formatoMail.setAttribute('type', 'hidden');
	formatoMail.setAttribute('name', 'formato');
	formatoMail.setAttribute('value', "html");
	
	var contenedorEnvioAmigo = document.createElement('div');
	contenedorEnvioAmigo.className = 'contenedorEnvioAmigo';
	contenedorEnvioAmigo.id = 'contenedorEnvioAmigo';
	
	var subcontenedorEnvioAmigo = document.createElement('div');
	subcontenedorEnvioAmigo.className = 'subcontenedorEnvioAmigo';

	var cerrarEnvioAmigo = document.createElement('div');
	cerrarEnvioAmigo.className = 'cerrarEnvioAmigo';
	
	var imgCerrar = document.createElement('img');
	imgCerrar.alt = "cerrar";
	imgCerrar.className = "puntero";
	imgCerrar.src = bases_estatico + '/css/cssimg/xBlancaSobreFondoGris.gif';
	imgCerrar.onclick = function () {objEnvioAmigo.closeEnvioAmigo(urlCaptcha,'captchaComentario');}; // Cerramos y recargamos el captcha de los comentarios
	cerrarEnvioAmigo.appendChild(imgCerrar);
	
	var formEnvioAmigo = document.createElement('form');
	formEnvioAmigo.className = "formEnvioAmigo";
	formEnvioAmigo.id = 'formEnvioAmigo';
	formEnvioAmigo.setAttribute('method', 'get');
	formEnvioAmigo.setAttribute('action', bases_estatico+url);
	
	var contenidoFormulario = document.createElement('div');
	contenidoFormulario.className = 'contenidoFormulario';
	
	var tituloEnvioAmigo = document.createElement('div');
	tituloEnvioAmigo.className = 'tituloEnvioAmigo';
	tituloEnvioAmigo.innerHTML = texto1;
	
	
/* Elementos de la primera linea */
	var l1b1 = document.createElement('div');
	l1b1.className = 'envioAmigoIzq';
	
	var label1 = document.createElement('label');
	label1.className = 'labelEnvioAmigo';
	label1.setAttribute('for', 'destino');
	label1.innerHTML = texto2;
	var input1 = document.createElement('input');
	input1.className = 'inputEnvioAmigo';
	input1.setAttribute('type', 'text');
	input1.setAttribute('name', 'destino');
	input1.setAttribute('id', 'destino');
	
	l1b1.appendChild(label1);
	l1b1.appendChild(input1);	
	
	var l1b2 = document.createElement('div');
	l1b2.className = 'envioAmigoDrc';
	
	var label2 = document.createElement('label');
	label2.className = 'labelEnvioAmigo';
	label2.setAttribute('for', 'asunto');
	label2.innerHTML = texto3;
	var input2 = document.createElement('input');
	input2.className = 'inputEnvioAmigo';
	input2.setAttribute('type', 'text');
	input2.setAttribute('name', 'asunto');
	input2.setAttribute('id', 'asunto');

	l1b2.appendChild(label2);
	l1b2.appendChild(input2);	

/*Elementos de la segunda linea*/
	var l2b1 = document.createElement('div');
	l2b1.className = 'envioAmigoIzq';
	
	var label3 = document.createElement('label');
	label3.className = 'labelEnvioAmigo';
	label3.setAttribute('for', 'tuCorreo');
	label3.innerHTML = texto4;
	var input3 = document.createElement('input');
	input3.className = 'inputEnvioAmigo';
	input3.setAttribute('type', 'text');
	input3.setAttribute('name', 'tuCorreo');
	input3.setAttribute('id', 'tuCorreo');
	
	l2b1.appendChild(label3);
	l2b1.appendChild(input3);	
	
	var l2b2 = document.createElement('div');
	l2b2.className = 'envioAmigoDrc';
	
	var label4 = document.createElement('label');
	label4.className = 'labelEnvioAmigo';
	label4.setAttribute('for', 'tuNombre');
	label4.innerHTML = texto5;
	var input4 = document.createElement('input');
	input4.className = 'inputEnvioAmigo';
	input4.setAttribute('type', 'text');
	input4.setAttribute('name', 'tuNombre');
	input4.setAttribute('id', 'tuNombre');
	
	l2b2.appendChild(label4);
	l2b2.appendChild(input4);
	
/*Elementos de la tercera linea*/	
	var l3b1 = document.createElement('div');
	l3b1.className = 'envioAmigoIzq';
	
	var label5 = document.createElement('label');
	label5.className = 'labelEnvioAmigo';
	label5.setAttribute('for', 'comentario');
	label5.innerHTML = texto6;
	
	var area = document.createElement('textarea');
	area.className = 'areaEnvioAmigo';
	area.setAttribute('name', 'comentario');
	area.setAttribute('id', 'comentarioEA');
	
	l3b1.appendChild(label5);
	l3b1.appendChild(area)

	
	var l3b2 = document.createElement('div');
	l3b2.className = 'envioAmigoDrc';
	
	var usoEnvioAmigo = document.createElement('div');
	usoEnvioAmigo.className = 'usoEnvioAmigo';
	usoEnvioAmigo.innerHTML = texto7;
	
	var bloqCheck = document.createElement('div');
	bloqCheck.className = 'bloqCheck';
	
	var input5 = document.createElement('input');
	input5.setAttribute('type', 'checkbox');
	input5.setAttribute('name', 'enviarAMi');
	input5.setAttribute('id', 'enviarAMi');
	
	var label6 = document.createElement('label');
	label6.className = 'labelEnvioAmigo';
	label6.setAttribute('for', 'enviarAMi');
	label6.innerHTML = texto8;
	
	bloqCheck.appendChild(input5);
	bloqCheck.appendChild(label6);
	
	var botonEnvioAmigo = document.createElement('img');
	botonEnvioAmigo.className = 'botonEnvioAmigo';
	botonEnvioAmigo.src = bases_estatico + imgEnviar;
	botonEnvioAmigo.onclick = function (e) {
		if (objEnvioAmigo.comprobarFormulario() == true)	
			objEnvioAmigo.envioCorreo(urlCaptcha, servidor + url + "?" + formEnvioAmigo.serialize());
	};
	
	l3b2.appendChild(usoEnvioAmigo);
	l3b2.appendChild(botonEnvioAmigo);	
	
	
	var l4b1 = document.createElement('div');
	l4b1.className ="envioAmigoIzq margen_sup5px";
	
	l4b1.appendChild(imagenCaptcha);
	l4b1.appendChild(inputCaptcha);
	
	var l4b2 = document.createElement('div');
	l4b2.className ="envioAmigoDrc margen_sup5px";
	
	l4b2.appendChild(recargaCaptcha);
	l4b2.appendChild(botonEnvioAmigo);
	l4b2.appendChild(bloqCheck);

	var br = document.createElement('br');

	
	
/*Reuno todos los elementos*/
	contenidoFormulario.appendChild(tituloEnvioAmigo);
	contenidoFormulario.appendChild(l1b1);
	contenidoFormulario.appendChild(l1b2);	
	contenidoFormulario.appendChild(pieBloq1);
	contenidoFormulario.appendChild(l2b1);
	contenidoFormulario.appendChild(l2b2);	
	contenidoFormulario.appendChild(pieBloq2);
	contenidoFormulario.appendChild(l3b1);
	contenidoFormulario.appendChild(l3b2);	
	contenidoFormulario.appendChild(pieBloq3);
	contenidoFormulario.appendChild(l4b1);
	contenidoFormulario.appendChild(l4b2);	
	contenidoFormulario.appendChild(pieBloq4);
	contenidoFormulario.appendChild(idNot);
	contenidoFormulario.appendChild(rutaVar);
	contenidoFormulario.appendChild(pag);	
	contenidoFormulario.appendChild(tituloNoticia);	
	contenidoFormulario.appendChild(formatoMail);
	
	formEnvioAmigo.appendChild(contenidoFormulario);
	
	subcontenedorEnvioAmigo.appendChild(cerrarEnvioAmigo);
	subcontenedorEnvioAmigo.appendChild(formEnvioAmigo);
	
	body.appendChild(contenedorEnvioAmigo);	
	contenedorEnvioAmigo.appendChild(subcontenedorEnvioAmigo);	
	body.appendChild(capaBloqueo);
	
	
	/* cálculo de la altura versión IE*/
	if(document.all)
	{
		var posY = (document.body.scrollTop || document.documentElement.scrollTop || 0) 
			+ Math.floor(document.documentElement.clientHeight / 2) - Math.floor(contenedorEnvioAmigo.offsetHeight / 2);
		var posX = Math.floor(document.body.clientWidth  / 2) - Math.floor(contenedorEnvioAmigo.offsetWidth / 2) 
			- (document.body.scrollLeft || document.documentElement.scrollLeft || 0);
		
	}
	/* cálculo de la altura versión Firefox*/
	else
	{
		var posY = window.scrollY + Math.floor(window.innerHeight / 2) - Math.floor(contenedorEnvioAmigo.offsetHeight / 2);
		var posX = Math.floor(window.innerWidth / 2) - Math.floor(contenedorEnvioAmigo.offsetWidth / 2) - window.scrollX;
	}	
	
	posY = (posY < 0) ? 0 : posY;
	contenedorEnvioAmigo.style.top = posY + "px";	
	posX = (posX < 0) ? 0 : posX;		
	contenedorEnvioAmigo.style.left = posX + "px";
}


/**
 * Abre en una ventana la ampliación de la imagen de una noticia
 */
function abrirAmpliacion(url, titulo, autor, pie, alto, ancho)
{
	var imagen = new Image();
	var pieAncho = 0;
	var altoImagen = 0;
	var anchoImagen = 0;
	var ventanaAmpliacion = null;
	var docAmpliacion = null;
	
	imagen.onload = function()
	{
		altoImagen = imagen.height;
		anchoImagen = imagen.width;		
		
		if (trim(alto) != "")
			alto = parseInt(alto) + 15;
		else
			alto = altoImagen + 15;
			
		if (parseInt(alto) > 0 && trim(pie) != "")
			alto = parseInt(alto) + 80;
			
		if (trim(ancho) != "")
		{
			pieAncho = ancho;
			ancho = parseInt(ancho) + 30;
		}
		else
		{
			pieAncho = anchoImagen;
			ancho = anchoImagen + 30;
		}		
				
		ventanaAmpliacion = window.open('about:blank','', 'height=' + alto + ', width=' + ancho + ',resizable=1,scrollbars=1');
		docAmpliacion = ventanaAmpliacion.document;
		docAmpliacion.write("<html><head><title>PÚBLICO</title></head><body>");
		docAmpliacion.write("<div style=\"width: " + pieAncho + "px;\">");
		docAmpliacion.write("<img src=\"" + url + "\" alt=\"" + titulo + "\">");
		
		if (trim(autor) != "")
			autor = autor + " - ";
		
		docAmpliacion.write("<div style=\"background-color: #F3F3F3; padding: 2px; font-size: 11px; font-family: Arial, Helvetica, sans-serif; font-weight: bold;\">" + autor + pie + "</div>");
		docAmpliacion.write("</div>");
		docAmpliacion.write("</body>");
		docAmpliacion.close();
		
	};
	
	imagen.src = url;
}

function votacionArticulo () 
{
		
}
var objVotacionArticulo = new votacionArticulo();


votacionArticulo.prototype.votaArticulo = function (idNoticia, idVotacion, valorVoto, url) {
	var altura = document.getElementById ("zonaVotos").offsetHeight + 30;
	var anchura = document.getElementById ("zonaVotos").offsetWidth + 30;
	var opaca = creaCapaOpaca(altura, anchura);
new Ajax.Request(url, {   
			parameters: '?idNoticia='+idNoticia+'&valorVoto='+valorVoto ,
			asynchronous: false,
			method: 'get',   
			onSuccess: function(respuesta) 
				{     
					//objGaleriaFS.actualizaVotacionFS(idVotacion, valorVoto);	
					var cadena = respuesta.responseText;
					cadena = trim(cadena);
					var inicio = cadena.indexOf("<error>");
					var fin = cadena.indexOf("</error>");
					var padre = document.getElementById("zonaVotos");
					if (inicio != -1 && fin != -1)
					{												
						var mensaje = cadena.substring (inicio + 7 , fin);
						setTextoOpaca(opaca, mensaje)
						document.body.style.cursor = "default"; 												
					}
					else 
					{				
						var info = cadena.evalJSON();			
						setTextoOpaca(opaca, "Su voto se ha contabilizado con éxito");
						var votos = info.valoracion;
						var valoraciones = info.valoraciones;
						var htmlVotos = $("zonaVotos").select(".contenedorResultadoEstrellas img");
						var htmlNumVotos = $("zonaVotos").select("span");
						htmlVotos.each(function(e, pos) {
							if (pos < votos) {
								e.src = baseEstaticoEspecifico + "css/cssimg/estrellaActiva.gif";
							} else {
								e.src = baseEstaticoEspecifico + "css/cssimg/estrellaInactiva.gif";
							}
						});					
						var ultimo = htmlNumVotos.last();	
						ultimo.innerHTML = valoraciones + ' Votos';						
					}
					padre.appendChild(opaca);		
				}, 
			onFailure: function(respuesta) 
				{     				
					objMensaje.creaMensaje(respuesta.responseText);
				}	
		});
}

/**
 * muestra info sobre un usuario dado por su ID.
 * @param idUsuario
 * @param capa id elemento <div> que contiene toda la vista del comentario.
 */
function muestraUsuario(idUsuario,idComentario) {
	var url = 'infoUsuario';
	var params = '?idUsuario=' + idUsuario + '&salida=json';
	
	new Ajax.Request(url, {
		parameters: params,
		asynchronous: false,
		method:'get',
		onSuccess: function(respuesta) {
			var usuario = respuesta.responseText.evalJSON().usuario;
			var capaBotones = $('c' + idComentario);
			//creacion capa usuario:
			var idCapaUsuario = 'uc';
			if( $(idCapaUsuario) != null )
				$(idCapaUsuario).remove();
			
			var capaUsuario = new Element('div', {'id': idCapaUsuario, 'class': 'opacidad', 'style' : 'display: none;'});
			capaUsuario.innerHTML = "<p>nombre&nbsp;de&nbsp;usuario:&nbsp;" + usuario.nombreUsuario['#text'] + "</p>" +
							/*antes: se contaba con el nombre y apellidos:
							 		"<p>nombre: " + usuario.nombre['#text'] + "</p>" +
									"<p>apellidos: " + usuario.apellidos['#text'] + "</p>" +
							 */
									"<p>karma:&nbsp;" + usuario.karma['#text'] + "</p>" +
									"<div class=\"cerrar\">[Pulse&nbsp;para&nbsp;cerrar]</div>";
			capaUsuario.observe('click',function() {capaUsuario.remove()});
			//insercion:
			capaBotones.appendChild(capaUsuario);
			capaUsuario.style.top = -(capaUsuario.getDimensions().height/2) + 'px';
			capaUsuario.style.left = capaBotones.getDimensions().width + 23 + 'px';
			capaUsuario.style.display = '';
		},
		onFailure: function(respuesta) {
			void(0);
		}
	});
}






/*	Función para el cambio de solapas y de información del especial "más visto, más enviado". Recibe como
 * 	parámetro el id de la solapa a marcar.
 *  Como resultado marca la solapa e intercambia la capa que se está mostrando por la relacionada con la 
 *  solicitada.
 *	Proviene de: libreriaGlobal.js
 *  Motivo: fallaba en IE7
 * */
function cambiarSolapaEspecial(idMarcar)
{
	var listaEnlaces = document.getElementById("solapasEspecial").getElementsByTagName('a');

	for (var i=0; i<listaEnlaces.length; i++)
	{
		listaEnlaces[i].className="";
	}


	var listaSolapas = document.getElementById("solapasEspecial");
	var solapas = listaSolapas.getElementsByTagName("li");
	var numSolapas = solapas.length;
	var i=0;
	var encontrado = false;
	for(var i= 0; i< numSolapas;i++)
	{		
		var enlaceActual =  solapas[i].getElementsByTagName('a');
		var idActual = enlaceActual[0].id;
		var solapaEnCurso = document.getElementById(idActual +"_1");
		solapaEnCurso.style.display = "none";
		if (enlaceActual[0].id == idMarcar)
		{
			enlaceActual[0].className = "actual";
			var capa = document.getElementById(idActual +"_1");
			capa.style.display ="block";
		}	
	}
}


var MiGadgeTo = {
	baseEstatico : window.baseEstaticoEspecifico,
	baseImpe : window.baseImpeEspecifico,
	baseRecursos : window.baseRecursosEspecifico,
	params : {
		"categoria" : "cat",
		"id" : "idGadget",
		"idPortada" : "idPortada",
		"idArticulo" : "idArticulo",
		"json" : "res",
		"nombrePref" : "pref",
		"operacion" : "op",
		"res" : "res",
		"timestamp" : "tsPortada",
		"online" : "online",
		"uuid" : "uuidGadget"
	},
	
	url_base : "/gadgets/gadget",
	operaciones : {
		"rss" : "obtieneRSS",
		"url" : "obtieneUrl",
		"noticia" : "obtieneArticulos",
		"galeria" : "obtieneGaleria",
		"multimedia" : "obtieneMultimedia",
		"listadoNoticias" : "obtieneArticulos",
		"secciones" : "obtieneSecciones"
	},
	
	/**
	 * Devuelve el valor del texto para un objeto JSON
	 * Por ejemplo:
	 * a = {"b" : "valor"} || a = {"b" : {"#text" : "valor"}} => getTextFromJSON(a.b) devuelve "valor"
	 * a = "4" || a = 4 => getTextFromJSON(a) devuelve "4"
	 * a = function() { bla bla bla } => getTextFromJSON(a) devuelve ""
	 * a = false => getTextFromJSON(a) devuelve "false"
	 */
	getTextFromJSON: function(obj) {
		var result = "";
		
		if (typeof obj == "undefined" || obj === null) { // Se trata de un objeto indefinido y/o nulo
			result = "";
		} else if (typeof obj == "object") {
			if (obj["#text"] != null) {
				result = obj["#text"];
			} else if (obj["#cdata"] != null) {
				result = obj["#cdata"];
			} else {
				result = "";
			}
		} else if (typeof obj == "function") { // Se trata de una función o método
			result = "";
		} else { // Se trata de una cadena, número o booleano, luego devolvemos el mismo objeto en forma de cadena
			result = "" + obj;
		}
		
		return result;
	},
	
	obtenerFuenteExterna: function(params, opc_asinc) {
		if (!params) {
			params = {};
		}
		params[this.params["operacion"]] = this.operaciones["url"];
		params[this.params["timestamp"]] = window.timestampPortada;
		var result = "";
		var urlAjax = this.url_base;
		if (params) {
			
			if (!!opc_asinc) {
				new Ajax.Request(
					urlAjax,
					{
						method : "get",
						parameters: $H(params).toQueryString(),
						onSuccess: function(transport, json) {
							try {
								result = transport.responseText.evalJSON() || null;
								result = MiGadgeTo.getTextFromJSON(result.respuesta["sherpa.respuesta"]["sherpa.datos"]);
								opc_asinc.exito(result);
							} catch(e) { // evalJSON() eleva "SyntaxError"
								return ""; // Devolvemos la cadena vacia
							} // Evitamos que se eleve una excepción
						},
						onFailure: function(transport, json) {
							try {
								opc_asinc.error();
								console.log("Ocurrió un fallo");
							} catch (e) {
							}
						},
						onException: function(transport, json) {
							try {
								opc_asinc.error();
								console.log("Ocurrió un fallo");
							} catch (e) {
							}
						}
					}
				);
			} else {
				new Ajax.Request(
					urlAjax,
					{
						asynchronous: false,
						method : "get",
						parameters: $H(params).toQueryString(),
						onSuccess: function(transport, json) {
							try {
								result = transport.responseText.evalJSON() || null;
								result = MiGadgeTo.getTextFromJSON(result.respuesta["sherpa.respuesta"]["sherpa.datos"]);
							} catch(e) { // evalJSON() eleva "SyntaxError"
								return ""; // Devolvemos la cadena vacia
							} // Evitamos que se eleve una excepción
						},
						onFailure: function(transport, json) {
							try {
								console.log("Ocurrió un fallo al leer la fuente externa");
							} catch (e) {
							}
						},
						onException: function(request, excepcion) {
							try {
								console.log("Ocurrió una excepción al leer la fuente externa");
							} catch (e) {
							}
						}
					}
				);
			}
		}
		
		return result; // Devolvemos una cadena
	},
	
	obtenerMultimedia: function(idArticulo, opc_asinc) {
		var params = {};
		params[this.params["idArticulo"]] = idArticulo;
		params[this.params["res"]] = "json";
		params[this.params["online"]] = "true";
		params[this.params["operacion"]] = this.operaciones["multimedia"]; 
		var result = null;
		var urlAjax = this.url_base;
		if (params) {
			
			if (!!opc_asinc) {
				new Ajax.Request(
					urlAjax,
					{
						method : "get",
						parameters: params,
						onSuccess: function(transport, json) {
							result = transport.responseText.evalJSON() || null;
							result = result.respuesta["sherpa.respuesta"]["sherpa.datos"]["articulo"];
							opc_asinc.exito(result);
						},
						onFailure: function(transport, json) {
							try {
								opc_asinc.error();
								console.log("Ocurrió un fallo");
							} catch (e) {
							}
						},
						onException: function(transport, json) {
							try {
								opc_asinc.error();
								console.log("Ocurrió un fallo");
							} catch (e) {
							}
						}
					}
				);
			} else {
				new Ajax.Request(
					urlAjax,
					{
						asynchronous: false,
						method : "get",
						parameters: params,
						onSuccess: function(transport, json) {
							result = transport.responseText.evalJSON() || null;
							result = result.respuesta["sherpa.respuesta"]["sherpa.datos"]["articulo"];
						},
						onFailure: function(transport, json) {
							try {
								console.log("Ocurrió un fallo al leer el multimedia");
							} catch (e) {
							}
						},
						onException: function(request, excepcion) {
							try {
								console.log("Ocurrió una excepción al leer el multimedia");
							} catch (e) {
							}
						}
					}
				);
			}
		}
		return result; // Devolvemos un objeto
	},
	
	obtenerNoticia: function(idArticulo, opc_asinc) {
		var params = {};
		params[this.params["idArticulo"]] = idArticulo;
		params[this.params["res"]] = "json";
		params[this.params["online"]] = "true";
		params[this.params["operacion"]] = this.operaciones["noticia"]; 
		var result = null;
		var urlAjax = this.url_base;
		if (params) {
			if (!!opc_asinc) {
				new Ajax.Request(
					urlAjax,
					{
						method : "get",
						parameters: params,
						onSuccess: function(transport, json) {
							result = transport.responseText.evalJSON() || null;
							result = result.respuesta["sherpa.respuesta"]["sherpa.datos"]["articulo"];
							opc_asinc.exito(result);
						},
						onFailure: function(transport, json) {
							try {
								opc_asinc.error();
								console.log("Ocurrió un fallo");
							} catch (e) {
							}
						},
						onException: function(transport, json) {
							try {
								opc_asinc.error();
								console.log("Ocurrió un fallo");
							} catch (e) {
							}
						}
					}
				);
			} else {
				new Ajax.Request(
					urlAjax,
					{
						asynchronous: false,
						method : "get",
						parameters: params,
						onSuccess: function(transport, json) {
							result = transport.responseText.evalJSON() || null;
							result = result.respuesta["sherpa.respuesta"]["sherpa.datos"]["articulo"];
						},
						onFailure: function(transport, json) {
							try {
								console.log("Ocurrió un fallo al leer la noticia");
							} catch (e) {
							}
						},
						onException: function(request, excepcion) {
							try {
								console.log("Ocurrió una excepción al leer la noticia");
							} catch (e) {
							}
						}
					}
				);
			}
			
		}
		return result; // Devolvemos un objeto
	},
	
	obtenerGaleria: function(idArticulo, opc_asinc) {
		var params = {};
		params[this.params["idArticulo"]] = idArticulo;
		params[this.params["res"]] = "json";
		params[this.params["online"]] = "true";
		params[this.params["operacion"]] = this.operaciones["galeria"]; 
		var result = null;
		var urlAjax = this.url_base;
		if (params) {
			if (!!opc_asinc) {
				new Ajax.Request(
					urlAjax,
					{
						method : "get",
						parameters: params,
						onSuccess: function(transport, json) {
							result = transport.responseText.evalJSON() || null;
							result = result.respuesta["sherpa.respuesta"]["sherpa.datos"]["articulo"];
							opc_asinc.exito(result);
						},
						onFailure: function(transport, json) {
							try {
								opc_asinc.error();
								console.log("Ocurrió un fallo");
							} catch (e) {
							}
						},
						onException: function(transport, json) {
							try {
								opc_asinc.error();
								console.log("Ocurrió un fallo");
							} catch (e) {
							}
						}
					}
				);
			} else {
				new Ajax.Request(
					urlAjax,
					{
						asynchronous: false,
						method : "get",
						parameters: params,
						onSuccess: function(transport, json) {
							result = transport.responseText.evalJSON() || null;
							result = result.respuesta["sherpa.respuesta"]["sherpa.datos"]["articulo"];
						},
						onFailure: function(transport, json) {
							try {
								console.log("Ocurrió un fallo al leer la galeria");
							} catch (e) {
							}
						},
						onException: function(request, excepcion) {
							try {
								console.log("Ocurrió una excepción al leer la galeria");
							} catch (e) {
							}
						}
					}
				);
			}
				
		}
		return result; // Devolvemos un objeto
	},
	
	obtenerRSS: function(params, opc_asinc) {
		if (!params) {
			params = {};
		}
		params[this.params["operacion"]] = this.operaciones["rss"];
		params[this.params["timestamp"]] = window.timestampPortada;
		var result = null;
		var urlAjax = this.url_base;
		if (params) {
			if (!!opc_asinc) {
				new Ajax.Request(
					urlAjax,
					{
						method : "get",
						parameters: params,
						onSuccess: function(transport, json) {
							var respuesta = transport.responseText;
							if (respuesta) {
								result = respuesta.evalJSON();
								result = result.respuesta["sherpa.respuesta"]["sherpa.datos"];
								opc_asinc.exito(result);
							} 
						},
						onFailure: function(transport, json) {
							try {
								opc_asinc.error();
								console.log("Ocurrió un fallo");
							} catch (e) {
							}
						},
						onException: function(transport, json) {
							try {
								opc_asinc.error();
								console.log("Ocurrió un fallo");
							} catch (e) {
							}
						}
					}
				);
			} else {
				new Ajax.Request(
					urlAjax,
					{
						asynchronous: false,
						method : "get",
						parameters: params,
						onSuccess: function(transport, json) {
							var respuesta = transport.responseText;
							if (respuesta) {
								result = respuesta.evalJSON();
								result = result.respuesta["sherpa.respuesta"]["sherpa.datos"];
							} 
						},
						onFailure: function(transport, json) {
							try {
								console.log("Ocurrió un fallo al leer el rss");
							} catch (e) {
							}
						},
						onException: function(request, excepcion) {
							try {
								console.log("Ocurrió una excepción al leer el rss");
							} catch (e) {
							}
						}
					}
				);
			}
				
		}
		return result; // Devolvemos un objeto
	},
	
	obtenerSecciones: function(cat, opc_asinc) {
		var params = {};
		params[this.params["categoria"]] = cat;
		params[this.params["operacion"]] = this.operaciones["secciones"]; // Extendemos los parámetros
		params[this.params["timestamp"]] = window.timestampPortada;
		var result = null;
		var urlAjax = this.url_base;
		if (params) {
			if (!!opc_asinc) {
				new Ajax.Request(
					urlAjax,
					{
						method : "get",
						parameters: params,
						onSuccess: function(transport, json) {
							var respuesta = transport.responseText;
							if (respuesta) {
								result = respuesta.evalJSON();
								result = result.respuesta["sherpa.respuesta"]["sherpa.datos"]["seccion"];
								opc_asinc.exito(result);
							} 
						},
						onFailure: function(transport, json) {
							try {
								opc_asinc.error();
								console.log("Ocurrió un fallo");
							} catch (e) {
							}
						},
						onException: function(transport, json) {
							try {
								opc_asinc.error();
								console.log("Ocurrió un fallo");
							} catch (e) {
							}
						}
					}
				);
			} else {
				new Ajax.Request(
					urlAjax,
					{
						asynchronous: false,
						method : "get",
						parameters: params,
						onSuccess: function(transport, json) {
							var respuesta = transport.responseText;
							if (respuesta) {
								result = respuesta.evalJSON();
								result = result.respuesta["sherpa.respuesta"]["sherpa.datos"]["seccion"];
							} 
							
						},
						onFailure: function(transport, json) {
							try {
								console.log("Ocurrió un fallo al obtener las secciones");
							} catch (e) {
							}
						},
						onException: function(request, excepcion) {
							try {
								console.log("Ocurrió una excepción al obtener las secciones");
							} catch (e) {
							}
						}
					}
				);
			}
				
		}
		return result; // Devolvemos un objeto
	},
	
	listadoNoticias: function(params, opc_asinc) {
		if (!params) {
			params = {};
		}
		params[this.params["online"]] = "true"
		params[this.params["operacion"]] = this.operaciones["listadoNoticias"]; // Extendemos los parámetros
		var result = null;
		var urlAjax = this.url_base;
		if (params) {
			if (!!opc_asinc) {
				new Ajax.Request(
					urlAjax,
					{
						method : "get",
						parameters: params,
						onSuccess: function(transport, json) {
							var respuesta = transport.responseText;
							if (respuesta) {
								result = respuesta.evalJSON();
								result = result.respuesta["sherpa.respuesta"]["sherpa.datos"]["articulo"];
								opc_asinc.exito(result);
							}
						},
						onFailure: function(transport, json) {
							try {
								opc_asinc.error();
								console.log("Ocurrió un fallo");
							} catch (e) {
							}
						},
						onException: function(transport, json) {
							try {
								opc_asinc.error();
								console.log("Ocurrió un fallo");
							} catch (e) {
							}
						}
					}
				);
			} else {
				new Ajax.Request(
					urlAjax,
					{
						asynchronous: false,
						method : "get",
						parameters: params,
						onSuccess: function(transport, json) {
							var respuesta = transport.responseText;
							if (respuesta) {
								result = respuesta.evalJSON();
								result = result.respuesta["sherpa.respuesta"]["sherpa.datos"]["articulo"];
							}
						},
						onFailure: function(transport, json) {
							try {
								console.log("Ocurrió un fallo al leer el listado de noticias");
							} catch (e) {
							}
						},
						onException: function(request, excepcion) {
							try {
								console.log("Ocurrió una excepción al leer el listado de noticias");
							} catch (e) {
							}
						}
					}
				);
			}
				
		}
		return result; // Devolvemos un objeto
	}
};

/*  Prototype JavaScript framework, version 1.6.0
 *  (c) 2005-2007 Sam Stephenson
 *
 *  Prototype is freely distributable under the terms of an MIT-style license.
 *  For details, see the Prototype web site: http://www.prototypejs.org/
 *
 *--------------------------------------------------------------------------*/

var Prototype = {
  Version: '1.6.0',

  Browser: {
    IE:     !!(window.attachEvent && !window.opera),
    Opera:  !!window.opera,
    WebKit: navigator.userAgent.indexOf('AppleWebKit/') > -1,
    Gecko:  navigator.userAgent.indexOf('Gecko') > -1 && navigator.userAgent.indexOf('KHTML') == -1,
    MobileSafari: !!navigator.userAgent.match(/Apple.*Mobile.*Safari/)
  },

  BrowserFeatures: {
    XPath: !!document.evaluate,
    ElementExtensions: !!window.HTMLElement,
    SpecificElementExtensions:
      document.createElement('div').__proto__ &&
      document.createElement('div').__proto__ !==
        document.createElement('form').__proto__
  },

  ScriptFragment: '<script[^>]*>([\\S\\s]*?)<\/script>',
  JSONFilter: /^\/\*-secure-([\s\S]*)\*\/\s*$/,

  emptyFunction: function() { },
  K: function(x) { return x }
};

if (Prototype.Browser.MobileSafari)
  Prototype.BrowserFeatures.SpecificElementExtensions = false;

if (Prototype.Browser.WebKit)
  Prototype.BrowserFeatures.XPath = false;

/* Based on Alex Arnell's inheritance implementation. */
var Class = {
  create: function() {
    var parent = null, properties = $A(arguments);
    if (Object.isFunction(properties[0]))
      parent = properties.shift();

    function klass() {
      this.initialize.apply(this, arguments);
    }

    Object.extend(klass, Class.Methods);
    klass.superclass = parent;
    klass.subclasses = [];

    if (parent) {
      var subclass = function() { };
      subclass.prototype = parent.prototype;
      klass.prototype = new subclass;
      parent.subclasses.push(klass);
    }

    for (var i = 0; i < properties.length; i++)
      klass.addMethods(properties[i]);

    if (!klass.prototype.initialize)
      klass.prototype.initialize = Prototype.emptyFunction;

    klass.prototype.constructor = klass;

    return klass;
  }
};

Class.Methods = {
  addMethods: function(source) {
    var ancestor   = this.superclass && this.superclass.prototype;
    var properties = Object.keys(source);

    if (!Object.keys({ toString: true }).length)
      properties.push("toString", "valueOf");

    for (var i = 0, length = properties.length; i < length; i++) {
      var property = properties[i], value = source[property];
      if (ancestor && Object.isFunction(value) &&
          value.argumentNames().first() == "$super") {
        var method = value, value = Object.extend((function(m) {
          return function() { return ancestor[m].apply(this, arguments) };
        })(property).wrap(method), {
          valueOf:  function() { return method },
          toString: function() { return method.toString() }
        });
      }
      this.prototype[property] = value;
    }

    return this;
  }
};

var Abstract = { };

Object.extend = function(destination, source) {
  for (var property in source)
    destination[property] = source[property];
  return destination;
};

Object.extend(Object, {
  inspect: function(object) {
    try {
      if (object === undefined) return 'undefined';
      if (object === null) return 'null';
      return object.inspect ? object.inspect() : object.toString();
    } catch (e) {
      if (e instanceof RangeError) return '...';
      throw e;
    }
  },

  toJSON: function(object) {
    var type = typeof object;
    switch (type) {
      case 'undefined':
      case 'function':
      case 'unknown': return;
      case 'boolean': return object.toString();
    }

    if (object === null) return 'null';
    if (object.toJSON) return object.toJSON();
    if (Object.isElement(object)) return;

    var results = [];
    for (var property in object) {
      var value = Object.toJSON(object[property]);
      if (value !== undefined)
        results.push(property.toJSON() + ': ' + value);
    }

    return '{' + results.join(', ') + '}';
  },

  toQueryString: function(object) {
    return $H(object).toQueryString();
  },

  toHTML: function(object) {
    return object && object.toHTML ? object.toHTML() : String.interpret(object);
  },

  keys: function(object) {
    var keys = [];
    for (var property in object)
      keys.push(property);
    return keys;
  },

  values: function(object) {
    var values = [];
    for (var property in object)
      values.push(object[property]);
    return values;
  },

  clone: function(object) {
    return Object.extend({ }, object);
  },

  isElement: function(object) {
    return object && object.nodeType == 1;
  },

  isArray: function(object) {
    return object && object.constructor === Array;
  },

  isHash: function(object) {
    return object instanceof Hash;
  },

  isFunction: function(object) {
    return typeof object == "function";
  },

  isString: function(object) {
    return typeof object == "string";
  },

  isNumber: function(object) {
    return typeof object == "number";
  },

  isUndefined: function(object) {
    return typeof object == "undefined";
  }
});

Object.extend(Function.prototype, {
  argumentNames: function() {
    var names = this.toString().match(/^[\s\(]*function[^(]*\((.*?)\)/)[1].split(",").invoke("strip");
    return names.length == 1 && !names[0] ? [] : names;
  },

  bind: function() {
    if (arguments.length < 2 && arguments[0] === undefined) return this;
    var __method = this, args = $A(arguments), object = args.shift();
    return function() {
      return __method.apply(object, args.concat($A(arguments)));
    }
  },

  bindAsEventListener: function() {
    var __method = this, args = $A(arguments), object = args.shift();
    return function(event) {
      return __method.apply(object, [event || window.event].concat(args));
    }
  },

  curry: function() {
    if (!arguments.length) return this;
    var __method = this, args = $A(arguments);
    return function() {
      return __method.apply(this, args.concat($A(arguments)));
    }
  },

  delay: function() {
    var __method = this, args = $A(arguments), timeout = args.shift() * 1000;
    return window.setTimeout(function() {
      return __method.apply(__method, args);
    }, timeout);
  },

  wrap: function(wrapper) {
    var __method = this;
    return function() {
      return wrapper.apply(this, [__method.bind(this)].concat($A(arguments)));
    }
  },

  methodize: function() {
    if (this._methodized) return this._methodized;
    var __method = this;
    return this._methodized = function() {
      return __method.apply(null, [this].concat($A(arguments)));
    };
  }
});

Function.prototype.defer = Function.prototype.delay.curry(0.01);

Date.prototype.toJSON = function() {
  return '"' + this.getUTCFullYear() + '-' +
    (this.getUTCMonth() + 1).toPaddedString(2) + '-' +
    this.getUTCDate().toPaddedString(2) + 'T' +
    this.getUTCHours().toPaddedString(2) + ':' +
    this.getUTCMinutes().toPaddedString(2) + ':' +
    this.getUTCSeconds().toPaddedString(2) + 'Z"';
};

var Try = {
  these: function() {
    var returnValue;

    for (var i = 0, length = arguments.length; i < length; i++) {
      var lambda = arguments[i];
      try {
        returnValue = lambda();
        break;
      } catch (e) { }
    }

    return returnValue;
  }
};

RegExp.prototype.match = RegExp.prototype.test;

RegExp.escape = function(str) {
  return String(str).replace(/([.*+?^=!:${}()|[\]\/\\])/g, '\\$1');
};

/*--------------------------------------------------------------------------*/

var PeriodicalExecuter = Class.create({
  initialize: function(callback, frequency) {
    this.callback = callback;
    this.frequency = frequency;
    this.currentlyExecuting = false;

    this.registerCallback();
  },

  registerCallback: function() {
    this.timer = setInterval(this.onTimerEvent.bind(this), this.frequency * 1000);
  },

  execute: function() {
    this.callback(this);
  },

  stop: function() {
    if (!this.timer) return;
    clearInterval(this.timer);
    this.timer = null;
  },

  onTimerEvent: function() {
    if (!this.currentlyExecuting) {
      try {
        this.currentlyExecuting = true;
        this.execute();
      } finally {
        this.currentlyExecuting = false;
      }
    }
  }
});
Object.extend(String, {
  interpret: function(value) {
    return value == null ? '' : String(value);
  },
  specialChar: {
    '\b': '\\b',
    '\t': '\\t',
    '\n': '\\n',
    '\f': '\\f',
    '\r': '\\r',
    '\\': '\\\\'
  }
});

Object.extend(String.prototype, {
  gsub: function(pattern, replacement) {
    var result = '', source = this, match;
    replacement = arguments.callee.prepareReplacement(replacement);

    while (source.length > 0) {
      if (match = source.match(pattern)) {
        result += source.slice(0, match.index);
        result += String.interpret(replacement(match));
        source  = source.slice(match.index + match[0].length);
      } else {
        result += source, source = '';
      }
    }
    return result;
  },

  sub: function(pattern, replacement, count) {
    replacement = this.gsub.prepareReplacement(replacement);
    count = count === undefined ? 1 : count;

    return this.gsub(pattern, function(match) {
      if (--count < 0) return match[0];
      return replacement(match);
    });
  },

  scan: function(pattern, iterator) {
    this.gsub(pattern, iterator);
    return String(this);
  },

  truncate: function(length, truncation) {
    length = length || 30;
    truncation = truncation === undefined ? '...' : truncation;
    return this.length > length ?
      this.slice(0, length - truncation.length) + truncation : String(this);
  },

  strip: function() {
    return this.replace(/^\s+/, '').replace(/\s+$/, '');
  },

  stripTags: function() {
    return this.replace(/<\/?[^>]+>/gi, '');
  },

  stripScripts: function() {
    return this.replace(new RegExp(Prototype.ScriptFragment, 'img'), '');
  },

  extractScripts: function() {
    var matchAll = new RegExp(Prototype.ScriptFragment, 'img');
    var matchOne = new RegExp(Prototype.ScriptFragment, 'im');
    return (this.match(matchAll) || []).map(function(scriptTag) {
      return (scriptTag.match(matchOne) || ['', ''])[1];
    });
  },

  evalScripts: function() {
    return this.extractScripts().map(function(script) { return eval(script) });
  },

  escapeHTML: function() {
    var self = arguments.callee;
    self.text.data = this;
    return self.div.innerHTML;
  },

  unescapeHTML: function() {
    var div = new Element('div');
    div.innerHTML = this.stripTags();
    return div.childNodes[0] ? (div.childNodes.length > 1 ?
      $A(div.childNodes).inject('', function(memo, node) { return memo+node.nodeValue }) :
      div.childNodes[0].nodeValue) : '';
  },

  toQueryParams: function(separator) {
    var match = this.strip().match(/([^?#]*)(#.*)?$/);
    if (!match) return { };

    return match[1].split(separator || '&').inject({ }, function(hash, pair) {
      if ((pair = pair.split('='))[0]) {
        var key = decodeURIComponent(pair.shift());
        var value = pair.length > 1 ? pair.join('=') : pair[0];
        if (value != undefined) value = decodeURIComponent(value);

        if (key in hash) {
          if (!Object.isArray(hash[key])) hash[key] = [hash[key]];
          hash[key].push(value);
        }
        else hash[key] = value;
      }
      return hash;
    });
  },

  toArray: function() {
    return this.split('');
  },

  succ: function() {
    return this.slice(0, this.length - 1) +
      String.fromCharCode(this.charCodeAt(this.length - 1) + 1);
  },

  times: function(count) {
    return count < 1 ? '' : new Array(count + 1).join(this);
  },

  camelize: function() {
    var parts = this.split('-'), len = parts.length;
    if (len == 1) return parts[0];

    var camelized = this.charAt(0) == '-'
      ? parts[0].charAt(0).toUpperCase() + parts[0].substring(1)
      : parts[0];

    for (var i = 1; i < len; i++)
      camelized += parts[i].charAt(0).toUpperCase() + parts[i].substring(1);

    return camelized;
  },

  capitalize: function() {
    return this.charAt(0).toUpperCase() + this.substring(1).toLowerCase();
  },

  underscore: function() {
    return this.gsub(/::/, '/').gsub(/([A-Z]+)([A-Z][a-z])/,'#{1}_#{2}').gsub(/([a-z\d])([A-Z])/,'#{1}_#{2}').gsub(/-/,'_').toLowerCase();
  },

  dasherize: function() {
    return this.gsub(/_/,'-');
  },

  inspect: function(useDoubleQuotes) {
    var escapedString = this.gsub(/[\x00-\x1f\\]/, function(match) {
      var character = String.specialChar[match[0]];
      return character ? character : '\\u00' + match[0].charCodeAt().toPaddedString(2, 16);
    });
    if (useDoubleQuotes) return '"' + escapedString.replace(/"/g, '\\"') + '"';
    return "'" + escapedString.replace(/'/g, '\\\'') + "'";
  },

  toJSON: function() {
    return this.inspect(true);
  },

  unfilterJSON: function(filter) {
    return this.sub(filter || Prototype.JSONFilter, '#{1}');
  },

  isJSON: function() {
    var str = this.replace(/\\./g, '@').replace(/"[^"\\\n\r]*"/g, '');
    return (/^[,:{}\[\]0-9.\-+Eaeflnr-u \n\r\t]*$/).test(str);
  },

  evalJSON: function(sanitize) {
    var json = this.unfilterJSON();
    try {
      if (!sanitize || json.isJSON()) return eval('(' + json + ')');
    } catch (e) { }
    throw new SyntaxError('Badly formed JSON string: ' + this.inspect());
  },

  include: function(pattern) {
    return this.indexOf(pattern) > -1;
  },

  startsWith: function(pattern) {
    return this.indexOf(pattern) === 0;
  },

  endsWith: function(pattern) {
    var d = this.length - pattern.length;
    return d >= 0 && this.lastIndexOf(pattern) === d;
  },

  empty: function() {
    return this == '';
  },

  blank: function() {
    return /^\s*$/.test(this);
  },

  interpolate: function(object, pattern) {
    return new Template(this, pattern).evaluate(object);
  }
});

if (Prototype.Browser.WebKit || Prototype.Browser.IE) Object.extend(String.prototype, {
  escapeHTML: function() {
    return this.replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;');
  },
  unescapeHTML: function() {
    return this.replace(/&amp;/g,'&').replace(/&lt;/g,'<').replace(/&gt;/g,'>');
  }
});

String.prototype.gsub.prepareReplacement = function(replacement) {
  if (Object.isFunction(replacement)) return replacement;
  var template = new Template(replacement);
  return function(match) { return template.evaluate(match) };
};

String.prototype.parseQuery = String.prototype.toQueryParams;

Object.extend(String.prototype.escapeHTML, {
  div:  document.createElement('div'),
  text: document.createTextNode('')
});

with (String.prototype.escapeHTML) div.appendChild(text);

var Template = Class.create({
  initialize: function(template, pattern) {
    this.template = template.toString();
    this.pattern = pattern || Template.Pattern;
  },

  evaluate: function(object) {
    if (Object.isFunction(object.toTemplateReplacements))
      object = object.toTemplateReplacements();

    return this.template.gsub(this.pattern, function(match) {
      if (object == null) return '';

      var before = match[1] || '';
      if (before == '\\') return match[2];

      var ctx = object, expr = match[3];
      var pattern = /^([^.[]+|\[((?:.*?[^\\])?)\])(\.|\[|$)/, match = pattern.exec(expr);
      if (match == null) return before;

      while (match != null) {
        var comp = match[1].startsWith('[') ? match[2].gsub('\\\\]', ']') : match[1];
        ctx = ctx[comp];
        if (null == ctx || '' == match[3]) break;
        expr = expr.substring('[' == match[3] ? match[1].length : match[0].length);
        match = pattern.exec(expr);
      }

      return before + String.interpret(ctx);
    }.bind(this));
  }
});
Template.Pattern = /(^|.|\r|\n)(#\{(.*?)\})/;

var $break = { };

var Enumerable = {
  each: function(iterator, context) {
    var index = 0;
    iterator = iterator.bind(context);
    try {
      this._each(function(value) {
        iterator(value, index++);
      });
    } catch (e) {
      if (e != $break) throw e;
    }
    return this;
  },

  eachSlice: function(number, iterator, context) {
    iterator = iterator ? iterator.bind(context) : Prototype.K;
    var index = -number, slices = [], array = this.toArray();
    while ((index += number) < array.length)
      slices.push(array.slice(index, index+number));
    return slices.collect(iterator, context);
  },

  all: function(iterator, context) {
    iterator = iterator ? iterator.bind(context) : Prototype.K;
    var result = true;
    this.each(function(value, index) {
      result = result && !!iterator(value, index);
      if (!result) throw $break;
    });
    return result;
  },

  any: function(iterator, context) {
    iterator = iterator ? iterator.bind(context) : Prototype.K;
    var result = false;
    this.each(function(value, index) {
      if (result = !!iterator(value, index))
        throw $break;
    });
    return result;
  },

  collect: function(iterator, context) {
    iterator = iterator ? iterator.bind(context) : Prototype.K;
    var results = [];
    this.each(function(value, index) {
      results.push(iterator(value, index));
    });
    return results;
  },

  detect: function(iterator, context) {
    iterator = iterator.bind(context);
    var result;
    this.each(function(value, index) {
      if (iterator(value, index)) {
        result = value;
        throw $break;
      }
    });
    return result;
  },

  findAll: function(iterator, context) {
    iterator = iterator.bind(context);
    var results = [];
    this.each(function(value, index) {
      if (iterator(value, index))
        results.push(value);
    });
    return results;
  },

  grep: function(filter, iterator, context) {
    iterator = iterator ? iterator.bind(context) : Prototype.K;
    var results = [];

    if (Object.isString(filter))
      filter = new RegExp(filter);

    this.each(function(value, index) {
      if (filter.match(value))
        results.push(iterator(value, index));
    });
    return results;
  },

  include: function(object) {
    if (Object.isFunction(this.indexOf))
      if (this.indexOf(object) != -1) return true;

    var found = false;
    this.each(function(value) {
      if (value == object) {
        found = true;
        throw $break;
      }
    });
    return found;
  },

  inGroupsOf: function(number, fillWith) {
    fillWith = fillWith === undefined ? null : fillWith;
    return this.eachSlice(number, function(slice) {
      while(slice.length < number) slice.push(fillWith);
      return slice;
    });
  },

  inject: function(memo, iterator, context) {
    iterator = iterator.bind(context);
    this.each(function(value, index) {
      memo = iterator(memo, value, index);
    });
    return memo;
  },

  invoke: function(method) {
    var args = $A(arguments).slice(1);
    return this.map(function(value) {
      return value[method].apply(value, args);
    });
  },

  max: function(iterator, context) {
    iterator = iterator ? iterator.bind(context) : Prototype.K;
    var result;
    this.each(function(value, index) {
      value = iterator(value, index);
      if (result == undefined || value >= result)
        result = value;
    });
    return result;
  },

  min: function(iterator, context) {
    iterator = iterator ? iterator.bind(context) : Prototype.K;
    var result;
    this.each(function(value, index) {
      value = iterator(value, index);
      if (result == undefined || value < result)
        result = value;
    });
    return result;
  },

  partition: function(iterator, context) {
    iterator = iterator ? iterator.bind(context) : Prototype.K;
    var trues = [], falses = [];
    this.each(function(value, index) {
      (iterator(value, index) ?
        trues : falses).push(value);
    });
    return [trues, falses];
  },

  pluck: function(property) {
    var results = [];
    this.each(function(value) {
      results.push(value[property]);
    });
    return results;
  },

  reject: function(iterator, context) {
    iterator = iterator.bind(context);
    var results = [];
    this.each(function(value, index) {
      if (!iterator(value, index))
        results.push(value);
    });
    return results;
  },

  sortBy: function(iterator, context) {
    iterator = iterator.bind(context);
    return this.map(function(value, index) {
      return {value: value, criteria: iterator(value, index)};
    }).sort(function(left, right) {
      var a = left.criteria, b = right.criteria;
      return a < b ? -1 : a > b ? 1 : 0;
    }).pluck('value');
  },

  toArray: function() {
    return this.map();
  },

  zip: function() {
    var iterator = Prototype.K, args = $A(arguments);
    if (Object.isFunction(args.last()))
      iterator = args.pop();

    var collections = [this].concat(args).map($A);
    return this.map(function(value, index) {
      return iterator(collections.pluck(index));
    });
  },

  size: function() {
    return this.toArray().length;
  },

  inspect: function() {
    return '#<Enumerable:' + this.toArray().inspect() + '>';
  }
};

Object.extend(Enumerable, {
  map:     Enumerable.collect,
  find:    Enumerable.detect,
  select:  Enumerable.findAll,
  filter:  Enumerable.findAll,
  member:  Enumerable.include,
  entries: Enumerable.toArray,
  every:   Enumerable.all,
  some:    Enumerable.any
});
function $A(iterable) {
  if (!iterable) return [];
  if (iterable.toArray) return iterable.toArray();
  var length = iterable.length, results = new Array(length);
  while (length--) results[length] = iterable[length];
  return results;
}

if (Prototype.Browser.WebKit) {
  function $A(iterable) {
    if (!iterable) return [];
    if (!(Object.isFunction(iterable) && iterable == '[object NodeList]') &&
        iterable.toArray) return iterable.toArray();
    var length = iterable.length, results = new Array(length);
    while (length--) results[length] = iterable[length];
    return results;
  }
}

Array.from = $A;

Object.extend(Array.prototype, Enumerable);

if (!Array.prototype._reverse) Array.prototype._reverse = Array.prototype.reverse;

Object.extend(Array.prototype, {
  _each: function(iterator) {
    for (var i = 0, length = this.length; i < length; i++)
      iterator(this[i]);
  },

  clear: function() {
    this.length = 0;
    return this;
  },

  first: function() {
    return this[0];
  },

  last: function() {
    return this[this.length - 1];
  },

  compact: function() {
    return this.select(function(value) {
      return value != null;
    });
  },

  flatten: function() {
    return this.inject([], function(array, value) {
      return array.concat(Object.isArray(value) ?
        value.flatten() : [value]);
    });
  },

  without: function() {
    var values = $A(arguments);
    return this.select(function(value) {
      return !values.include(value);
    });
  },

  reverse: function(inline) {
    return (inline !== false ? this : this.toArray())._reverse();
  },

  reduce: function() {
    return this.length > 1 ? this : this[0];
  },

  uniq: function(sorted) {
    return this.inject([], function(array, value, index) {
      if (0 == index || (sorted ? array.last() != value : !array.include(value)))
        array.push(value);
      return array;
    });
  },

  intersect: function(array) {
    return this.uniq().findAll(function(item) {
      return array.detect(function(value) { return item === value });
    });
  },

  clone: function() {
    return [].concat(this);
  },

  size: function() {
    return this.length;
  },

  inspect: function() {
    return '[' + this.map(Object.inspect).join(', ') + ']';
  },

  toJSON: function() {
    var results = [];
    this.each(function(object) {
      var value = Object.toJSON(object);
      if (value !== undefined) results.push(value);
    });
    return '[' + results.join(', ') + ']';
  }
});

// use native browser JS 1.6 implementation if available
if (Object.isFunction(Array.prototype.forEach))
  Array.prototype._each = Array.prototype.forEach;

if (!Array.prototype.indexOf) Array.prototype.indexOf = function(item, i) {
  i || (i = 0);
  var length = this.length;
  if (i < 0) i = length + i;
  for (; i < length; i++)
    if (this[i] === item) return i;
  return -1;
};

if (!Array.prototype.lastIndexOf) Array.prototype.lastIndexOf = function(item, i) {
  i = isNaN(i) ? this.length : (i < 0 ? this.length + i : i) + 1;
  var n = this.slice(0, i).reverse().indexOf(item);
  return (n < 0) ? n : i - n - 1;
};

Array.prototype.toArray = Array.prototype.clone;

function $w(string) {
  if (!Object.isString(string)) return [];
  string = string.strip();
  return string ? string.split(/\s+/) : [];
}

if (Prototype.Browser.Opera){
  Array.prototype.concat = function() {
    var array = [];
    for (var i = 0, length = this.length; i < length; i++) array.push(this[i]);
    for (var i = 0, length = arguments.length; i < length; i++) {
      if (Object.isArray(arguments[i])) {
        for (var j = 0, arrayLength = arguments[i].length; j < arrayLength; j++)
          array.push(arguments[i][j]);
      } else {
        array.push(arguments[i]);
      }
    }
    return array;
  };
}
Object.extend(Number.prototype, {
  toColorPart: function() {
    return this.toPaddedString(2, 16);
  },

  succ: function() {
    return this + 1;
  },

  times: function(iterator) {
    $R(0, this, true).each(iterator);
    return this;
  },

  toPaddedString: function(length, radix) {
    var string = this.toString(radix || 10);
    return '0'.times(length - string.length) + string;
  },

  toJSON: function() {
    return isFinite(this) ? this.toString() : 'null';
  }
});

$w('abs round ceil floor').each(function(method){
  Number.prototype[method] = Math[method].methodize();
});
function $H(object) {
  return new Hash(object);
};

var Hash = Class.create(Enumerable, (function() {
  if (function() {
    var i = 0, Test = function(value) { this.key = value };
    Test.prototype.key = 'foo';
    for (var property in new Test('bar')) i++;
    return i > 1;
  }()) {
    function each(iterator) {
      var cache = [];
      for (var key in this._object) {
        var value = this._object[key];
        if (cache.include(key)) continue;
        cache.push(key);
        var pair = [key, value];
        pair.key = key;
        pair.value = value;
        iterator(pair);
      }
    }
  } else {
    function each(iterator) {
      for (var key in this._object) {
        var value = this._object[key], pair = [key, value];
        pair.key = key;
        pair.value = value;
        iterator(pair);
      }
    }
  }

  function toQueryPair(key, value) {
    if (Object.isUndefined(value)) return key;
    return key + '=' + encodeURIComponent(String.interpret(value));
  }

  return {
    initialize: function(object) {
      this._object = Object.isHash(object) ? object.toObject() : Object.clone(object);
    },

    _each: each,

    set: function(key, value) {
      return this._object[key] = value;
    },

    get: function(key) {
      return this._object[key];
    },

    unset: function(key) {
      var value = this._object[key];
      delete this._object[key];
      return value;
    },

    toObject: function() {
      return Object.clone(this._object);
    },

    keys: function() {
      return this.pluck('key');
    },

    values: function() {
      return this.pluck('value');
    },

    index: function(value) {
      var match = this.detect(function(pair) {
        return pair.value === value;
      });
      return match && match.key;
    },

    merge: function(object) {
      return this.clone().update(object);
    },

    update: function(object) {
      return new Hash(object).inject(this, function(result, pair) {
        result.set(pair.key, pair.value);
        return result;
      });
    },

    toQueryString: function() {
      return this.map(function(pair) {
        var key = encodeURIComponent(pair.key), values = pair.value;

        if (values && typeof values == 'object') {
          if (Object.isArray(values))
            return values.map(toQueryPair.curry(key)).join('&');
        }
        return toQueryPair(key, values);
      }).join('&');
    },

    inspect: function() {
      return '#<Hash:{' + this.map(function(pair) {
        return pair.map(Object.inspect).join(': ');
      }).join(', ') + '}>';
    },

    toJSON: function() {
      return Object.toJSON(this.toObject());
    },

    clone: function() {
      return new Hash(this);
    }
  }
})());

Hash.prototype.toTemplateReplacements = Hash.prototype.toObject;
Hash.from = $H;
var ObjectRange = Class.create(Enumerable, {
  initialize: function(start, end, exclusive) {
    this.start = start;
    this.end = end;
    this.exclusive = exclusive;
  },

  _each: function(iterator) {
    var value = this.start;
    while (this.include(value)) {
      iterator(value);
      value = value.succ();
    }
  },

  include: function(value) {
    if (value < this.start)
      return false;
    if (this.exclusive)
      return value < this.end;
    return value <= this.end;
  }
});

var $R = function(start, end, exclusive) {
  return new ObjectRange(start, end, exclusive);
};

var Ajax = {
  getTransport: function() {
    return Try.these(
      function() {return new XMLHttpRequest()},
      function() {return new ActiveXObject('Msxml2.XMLHTTP')},
      function() {return new ActiveXObject('Microsoft.XMLHTTP')}
    ) || false;
  },

  activeRequestCount: 0
};

Ajax.Responders = {
  responders: [],

  _each: function(iterator) {
    this.responders._each(iterator);
  },

  register: function(responder) {
    if (!this.include(responder))
      this.responders.push(responder);
  },

  unregister: function(responder) {
    this.responders = this.responders.without(responder);
  },

  dispatch: function(callback, request, transport, json) {
    this.each(function(responder) {
      if (Object.isFunction(responder[callback])) {
        try {
          responder[callback].apply(responder, [request, transport, json]);
        } catch (e) { }
      }
    });
  }
};

Object.extend(Ajax.Responders, Enumerable);

Ajax.Responders.register({
  onCreate:   function() { Ajax.activeRequestCount++ },
  onComplete: function() { Ajax.activeRequestCount-- }
});

Ajax.Base = Class.create({
  initialize: function(options) {
    this.options = {
      method:       'post',
      asynchronous: true,
      contentType:  'application/x-www-form-urlencoded',
      encoding:     'UTF-8',
      parameters:   '',
      evalJSON:     true,
      evalJS:       true
    };
    Object.extend(this.options, options || { });

    this.options.method = this.options.method.toLowerCase();
    if (Object.isString(this.options.parameters))
      this.options.parameters = this.options.parameters.toQueryParams();
  }
});

Ajax.Request = Class.create(Ajax.Base, {
  _complete: false,

  initialize: function($super, url, options) {
    $super(options);
    this.transport = Ajax.getTransport();
    this.request(url);
  },

  request: function(url) {
    this.url = url;
    this.method = this.options.method;
    var params = Object.clone(this.options.parameters);

    if (!['get', 'post'].include(this.method)) {
      // simulate other verbs over post
      params['_method'] = this.method;
      this.method = 'post';
    }

    this.parameters = params;

    if (params = Object.toQueryString(params)) {
      // when GET, append parameters to URL
      if (this.method == 'get')
        this.url += (this.url.include('?') ? '&' : '?') + params;
      else if (/Konqueror|Safari|KHTML/.test(navigator.userAgent))
        params += '&_=';
    }

    try {
      var response = new Ajax.Response(this);
      if (this.options.onCreate) this.options.onCreate(response);
      Ajax.Responders.dispatch('onCreate', this, response);

      this.transport.open(this.method.toUpperCase(), this.url,
        this.options.asynchronous);

      if (this.options.asynchronous) this.respondToReadyState.bind(this).defer(1);

      this.transport.onreadystatechange = this.onStateChange.bind(this);
      this.setRequestHeaders();

      this.body = this.method == 'post' ? (this.options.postBody || params) : null;
      this.transport.send(this.body);

      /* Force Firefox to handle ready state 4 for synchronous requests */
      if (!this.options.asynchronous && this.transport.overrideMimeType)
        this.onStateChange();

    }
    catch (e) {
      this.dispatchException(e);
    }
  },

  onStateChange: function() {
    var readyState = this.transport.readyState;
    if (readyState > 1 && !((readyState == 4) && this._complete))
      this.respondToReadyState(this.transport.readyState);
  },

  setRequestHeaders: function() {
    var headers = {
      'X-Requested-With': 'XMLHttpRequest',
      'X-Prototype-Version': Prototype.Version,
      'Accept': 'text/javascript, text/html, application/xml, text/xml, */*'
    };

    if (this.method == 'post') {
      headers['Content-type'] = this.options.contentType +
        (this.options.encoding ? '; charset=' + this.options.encoding : '');

      /* Force "Connection: close" for older Mozilla browsers to work
       * around a bug where XMLHttpRequest sends an incorrect
       * Content-length header. See Mozilla Bugzilla #246651.
       */
      if (this.transport.overrideMimeType &&
          (navigator.userAgent.match(/Gecko\/(\d{4})/) || [0,2005])[1] < 2005)
            headers['Connection'] = 'close';
    }

    // user-defined headers
    if (typeof this.options.requestHeaders == 'object') {
      var extras = this.options.requestHeaders;

      if (Object.isFunction(extras.push))
        for (var i = 0, length = extras.length; i < length; i += 2)
          headers[extras[i]] = extras[i+1];
      else
        $H(extras).each(function(pair) { headers[pair.key] = pair.value });
    }

    for (var name in headers)
      this.transport.setRequestHeader(name, headers[name]);
  },

  success: function() {
    var status = this.getStatus();
    return !status || (status >= 200 && status < 300);
  },

  getStatus: function() {
    try {
      return this.transport.status || 0;
    } catch (e) { return 0 }
  },

  respondToReadyState: function(readyState) {
    var state = Ajax.Request.Events[readyState], response = new Ajax.Response(this);

    if (state == 'Complete') {
      try {
        this._complete = true;
        (this.options['on' + response.status]
         || this.options['on' + (this.success() ? 'Success' : 'Failure')]
         || Prototype.emptyFunction)(response, response.headerJSON);
      } catch (e) {
        this.dispatchException(e);
      }

      var contentType = response.getHeader('Content-type');
      if (this.options.evalJS == 'force'
          || (this.options.evalJS && contentType
          && contentType.match(/^\s*(text|application)\/(x-)?(java|ecma)script(;.*)?\s*$/i)))
        this.evalResponse();
    }

    try {
      (this.options['on' + state] || Prototype.emptyFunction)(response, response.headerJSON);
      Ajax.Responders.dispatch('on' + state, this, response, response.headerJSON);
    } catch (e) {
      this.dispatchException(e);
    }

    if (state == 'Complete') {
      // avoid memory leak in MSIE: clean up
      this.transport.onreadystatechange = Prototype.emptyFunction;
    }
  },

  getHeader: function(name) {
    try {
      return this.transport.getResponseHeader(name);
    } catch (e) { return null }
  },

  evalResponse: function() {
    try {
      return eval((this.transport.responseText || '').unfilterJSON());
    } catch (e) {
      this.dispatchException(e);
    }
  },

  dispatchException: function(exception) {
    (this.options.onException || Prototype.emptyFunction)(this, exception);
    Ajax.Responders.dispatch('onException', this, exception);
  }
});

Ajax.Request.Events =
  ['Uninitialized', 'Loading', 'Loaded', 'Interactive', 'Complete'];

Ajax.Response = Class.create({
  initialize: function(request){
    this.request = request;
    var transport  = this.transport  = request.transport,
        readyState = this.readyState = transport.readyState;

    if((readyState > 2 && !Prototype.Browser.IE) || readyState == 4) {
      this.status       = this.getStatus();
      this.statusText   = this.getStatusText();
      this.responseText = String.interpret(transport.responseText);
      this.headerJSON   = this._getHeaderJSON();
    }

    if(readyState == 4) {
      var xml = transport.responseXML;
      this.responseXML  = xml === undefined ? null : xml;
      this.responseJSON = this._getResponseJSON();
    }
  },

  status:      0,
  statusText: '',

  getStatus: Ajax.Request.prototype.getStatus,

  getStatusText: function() {
    try {
      return this.transport.statusText || '';
    } catch (e) { return '' }
  },

  getHeader: Ajax.Request.prototype.getHeader,

  getAllHeaders: function() {
    try {
      return this.getAllResponseHeaders();
    } catch (e) { return null }
  },

  getResponseHeader: function(name) {
    return this.transport.getResponseHeader(name);
  },

  getAllResponseHeaders: function() {
    return this.transport.getAllResponseHeaders();
  },

  _getHeaderJSON: function() {
    var json = this.getHeader('X-JSON');
    if (!json) return null;
    json = decodeURIComponent(escape(json));
    try {
      return json.evalJSON(this.request.options.sanitizeJSON);
    } catch (e) {
      this.request.dispatchException(e);
    }
  },

  _getResponseJSON: function() {
    var options = this.request.options;
    if (!options.evalJSON || (options.evalJSON != 'force' &&
      !(this.getHeader('Content-type') || '').include('application/json')))
        return null;
    try {
      return this.transport.responseText.evalJSON(options.sanitizeJSON);
    } catch (e) {
      this.request.dispatchException(e);
    }
  }
});

Ajax.Updater = Class.create(Ajax.Request, {
  initialize: function($super, container, url, options) {
    this.container = {
      success: (container.success || container),
      failure: (container.failure || (container.success ? null : container))
    };

    options = options || { };
    var onComplete = options.onComplete;
    options.onComplete = (function(response, param) {
      this.updateContent(response.responseText);
      if (Object.isFunction(onComplete)) onComplete(response, param);
    }).bind(this);

    $super(url, options);
  },

  updateContent: function(responseText) {
    var receiver = this.container[this.success() ? 'success' : 'failure'],
        options = this.options;

    if (!options.evalScripts) responseText = responseText.stripScripts();

    if (receiver = $(receiver)) {
      if (options.insertion) {
        if (Object.isString(options.insertion)) {
          var insertion = { }; insertion[options.insertion] = responseText;
          receiver.insert(insertion);
        }
        else options.insertion(receiver, responseText);
      }
      else receiver.update(responseText);
    }

    if (this.success()) {
      if (this.onComplete) this.onComplete.bind(this).defer();
    }
  }
});

Ajax.PeriodicalUpdater = Class.create(Ajax.Base, {
  initialize: function($super, container, url, options) {
    $super(options);
    this.onComplete = this.options.onComplete;

    this.frequency = (this.options.frequency || 2);
    this.decay = (this.options.decay || 1);

    this.updater = { };
    this.container = container;
    this.url = url;

    this.start();
  },

  start: function() {
    this.options.onComplete = this.updateComplete.bind(this);
    this.onTimerEvent();
  },

  stop: function() {
    this.updater.options.onComplete = undefined;
    clearTimeout(this.timer);
    (this.onComplete || Prototype.emptyFunction).apply(this, arguments);
  },

  updateComplete: function(response) {
    if (this.options.decay) {
      this.decay = (response.responseText == this.lastText ?
        this.decay * this.options.decay : 1);

      this.lastText = response.responseText;
    }
    this.timer = this.onTimerEvent.bind(this).delay(this.decay * this.frequency);
  },

  onTimerEvent: function() {
    this.updater = new Ajax.Updater(this.container, this.url, this.options);
  }
});
function $(element) {
  if (arguments.length > 1) {
    for (var i = 0, elements = [], length = arguments.length; i < length; i++)
      elements.push($(arguments[i]));
    return elements;
  }
  if (Object.isString(element))
    element = document.getElementById(element);
  return Element.extend(element);
}

if (Prototype.BrowserFeatures.XPath) {
  document._getElementsByXPath = function(expression, parentElement) {
    var results = [];
    var query = document.evaluate(expression, $(parentElement) || document,
      null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
    for (var i = 0, length = query.snapshotLength; i < length; i++)
      results.push(Element.extend(query.snapshotItem(i)));
    return results;
  };
}

/*--------------------------------------------------------------------------*/

if (!window.Node) var Node = { };

if (!Node.ELEMENT_NODE) {
  // DOM level 2 ECMAScript Language Binding
  Object.extend(Node, {
    ELEMENT_NODE: 1,
    ATTRIBUTE_NODE: 2,
    TEXT_NODE: 3,
    CDATA_SECTION_NODE: 4,
    ENTITY_REFERENCE_NODE: 5,
    ENTITY_NODE: 6,
    PROCESSING_INSTRUCTION_NODE: 7,
    COMMENT_NODE: 8,
    DOCUMENT_NODE: 9,
    DOCUMENT_TYPE_NODE: 10,
    DOCUMENT_FRAGMENT_NODE: 11,
    NOTATION_NODE: 12
  });
}

(function() {
  var element = this.Element;
  this.Element = function(tagName, attributes) {
    attributes = attributes || { };
    tagName = tagName.toLowerCase();
    var cache = Element.cache;
    if (Prototype.Browser.IE && attributes.name) {
      tagName = '<' + tagName + ' name="' + attributes.name + '">';
      delete attributes.name;
      return Element.writeAttribute(document.createElement(tagName), attributes);
    }
    if (!cache[tagName]) cache[tagName] = Element.extend(document.createElement(tagName));
    return Element.writeAttribute(cache[tagName].cloneNode(false), attributes);
  };
  Object.extend(this.Element, element || { });
}).call(window);

Element.cache = { };

Element.Methods = {
  visible: function(element) {
    return $(element).style.display != 'none';
  },

  toggle: function(element) {
    element = $(element);
    Element[Element.visible(element) ? 'hide' : 'show'](element);
    return element;
  },

  hide: function(element) {
    $(element).style.display = 'none';
    return element;
  },

  show: function(element) {
    $(element).style.display = '';
    return element;
  },

  remove: function(element) {
    element = $(element);
    element.parentNode.removeChild(element);
    return element;
  },

  update: function(element, content) {
    element = $(element);
    if (content && content.toElement) content = content.toElement();
    if (Object.isElement(content)) return element.update().insert(content);
    content = Object.toHTML(content);
    element.innerHTML = content.stripScripts();
    content.evalScripts.bind(content).defer();
    return element;
  },

  replace: function(element, content) {
    element = $(element);
    if (content && content.toElement) content = content.toElement();
    else if (!Object.isElement(content)) {
      content = Object.toHTML(content);
      var range = element.ownerDocument.createRange();
      range.selectNode(element);
      content.evalScripts.bind(content).defer();
      content = range.createContextualFragment(content.stripScripts());
    }
    element.parentNode.replaceChild(content, element);
    return element;
  },

  insert: function(element, insertions) {
    element = $(element);

    if (Object.isString(insertions) || Object.isNumber(insertions) ||
        Object.isElement(insertions) || (insertions && (insertions.toElement || insertions.toHTML)))
          insertions = {bottom:insertions};

    var content, t, range;

    for (position in insertions) {
      content  = insertions[position];
      position = position.toLowerCase();
      t = Element._insertionTranslations[position];

      if (content && content.toElement) content = content.toElement();
      if (Object.isElement(content)) {
        t.insert(element, content);
        continue;
      }

      content = Object.toHTML(content);

      range = element.ownerDocument.createRange();
      t.initializeRange(element, range);
      t.insert(element, range.createContextualFragment(content.stripScripts()));

      content.evalScripts.bind(content).defer();
    }

    return element;
  },

  wrap: function(element, wrapper, attributes) {
    element = $(element);
    if (Object.isElement(wrapper))
      $(wrapper).writeAttribute(attributes || { });
    else if (Object.isString(wrapper)) wrapper = new Element(wrapper, attributes);
    else wrapper = new Element('div', wrapper);
    if (element.parentNode)
      element.parentNode.replaceChild(wrapper, element);
    wrapper.appendChild(element);
    return wrapper;
  },

  inspect: function(element) {
    element = $(element);
    var result = '<' + element.tagName.toLowerCase();
    $H({'id': 'id', 'className': 'class'}).each(function(pair) {
      var property = pair.first(), attribute = pair.last();
      var value = (element[property] || '').toString();
      if (value) result += ' ' + attribute + '=' + value.inspect(true);
    });
    return result + '>';
  },

  recursivelyCollect: function(element, property) {
    element = $(element);
    var elements = [];
    while (element = element[property])
      if (element.nodeType == 1)
        elements.push(Element.extend(element));
    return elements;
  },

  ancestors: function(element) {
    return $(element).recursivelyCollect('parentNode');
  },

  descendants: function(element) {
    return $A($(element).getElementsByTagName('*')).each(Element.extend);
  },

  firstDescendant: function(element) {
    element = $(element).firstChild;
    while (element && element.nodeType != 1) element = element.nextSibling;
    return $(element);
  },

  immediateDescendants: function(element) {
    if (!(element = $(element).firstChild)) return [];
    while (element && element.nodeType != 1) element = element.nextSibling;
    if (element) return [element].concat($(element).nextSiblings());
    return [];
  },

  previousSiblings: function(element) {
    return $(element).recursivelyCollect('previousSibling');
  },

  nextSiblings: function(element) {
    return $(element).recursivelyCollect('nextSibling');
  },

  siblings: function(element) {
    element = $(element);
    return element.previousSiblings().reverse().concat(element.nextSiblings());
  },

  match: function(element, selector) {
    if (Object.isString(selector))
      selector = new Selector(selector);
    return selector.match($(element));
  },

  up: function(element, expression, index) {
    element = $(element);
    if (arguments.length == 1) return $(element.parentNode);
    var ancestors = element.ancestors();
    return expression ? Selector.findElement(ancestors, expression, index) :
      ancestors[index || 0];
  },

  down: function(element, expression, index) {
    element = $(element);
    if (arguments.length == 1) return element.firstDescendant();
    var descendants = element.descendants();
    return expression ? Selector.findElement(descendants, expression, index) :
      descendants[index || 0];
  },

  previous: function(element, expression, index) {
    element = $(element);
    if (arguments.length == 1) return $(Selector.handlers.previousElementSibling(element));
    var previousSiblings = element.previousSiblings();
    return expression ? Selector.findElement(previousSiblings, expression, index) :
      previousSiblings[index || 0];
  },

  next: function(element, expression, index) {
    element = $(element);
    if (arguments.length == 1) return $(Selector.handlers.nextElementSibling(element));
    var nextSiblings = element.nextSiblings();
    return expression ? Selector.findElement(nextSiblings, expression, index) :
      nextSiblings[index || 0];
  },

  select: function() {
    var args = $A(arguments), element = $(args.shift());
    return Selector.findChildElements(element, args);
  },

  adjacent: function() {
    var args = $A(arguments), element = $(args.shift());
    return Selector.findChildElements(element.parentNode, args).without(element);
  },

  identify: function(element) {
    element = $(element);
    var id = element.readAttribute('id'), self = arguments.callee;
    if (id) return id;
    do { id = 'anonymous_element_' + self.counter++ } while ($(id));
    element.writeAttribute('id', id);
    return id;
  },

  readAttribute: function(element, name) {
    element = $(element);
    if (Prototype.Browser.IE) {
      var t = Element._attributeTranslations.read;
      if (t.values[name]) return t.values[name](element, name);
      if (t.names[name]) name = t.names[name];
      if (name.include(':')) {
        return (!element.attributes || !element.attributes[name]) ? null :
         element.attributes[name].value;
      }
    }
    return element.getAttribute(name);
  },

  writeAttribute: function(element, name, value) {
    element = $(element);
    var attributes = { }, t = Element._attributeTranslations.write;

    if (typeof name == 'object') attributes = name;
    else attributes[name] = value === undefined ? true : value;

    for (var attr in attributes) {
      var name = t.names[attr] || attr, value = attributes[attr];
      if (t.values[attr]) name = t.values[attr](element, value);
      if (value === false || value === null)
        element.removeAttribute(name);
      else if (value === true)
        element.setAttribute(name, name);
      else element.setAttribute(name, value);
    }
    return element;
  },

  getHeight: function(element) {
    return $(element).getDimensions().height;
  },

  getWidth: function(element) {
    return $(element).getDimensions().width;
  },

  classNames: function(element) {
    return new Element.ClassNames(element);
  },

  hasClassName: function(element, className) {
    if (!(element = $(element))) return;
    var elementClassName = element.className;
    return (elementClassName.length > 0 && (elementClassName == className ||
      new RegExp("(^|\\s)" + className + "(\\s|$)").test(elementClassName)));
  },

  addClassName: function(element, className) {
    if (!(element = $(element))) return;
    if (!element.hasClassName(className))
      element.className += (element.className ? ' ' : '') + className;
    return element;
  },

  removeClassName: function(element, className) {
    if (!(element = $(element))) return;
    element.className = element.className.replace(
      new RegExp("(^|\\s+)" + className + "(\\s+|$)"), ' ').strip();
    return element;
  },

  toggleClassName: function(element, className) {
    if (!(element = $(element))) return;
    return element[element.hasClassName(className) ?
      'removeClassName' : 'addClassName'](className);
  },

  // removes whitespace-only text node children
  cleanWhitespace: function(element) {
    element = $(element);
    var node = element.firstChild;
    while (node) {
      var nextNode = node.nextSibling;
      if (node.nodeType == 3 && !/\S/.test(node.nodeValue))
        element.removeChild(node);
      node = nextNode;
    }
    return element;
  },

  empty: function(element) {
    return $(element).innerHTML.blank();
  },

  descendantOf: function(element, ancestor) {
    element = $(element), ancestor = $(ancestor);

    if (element.compareDocumentPosition)
      return (element.compareDocumentPosition(ancestor) & 8) === 8;

    if (element.sourceIndex && !Prototype.Browser.Opera) {
      var e = element.sourceIndex, a = ancestor.sourceIndex,
       nextAncestor = ancestor.nextSibling;
      if (!nextAncestor) {
        do { ancestor = ancestor.parentNode; }
        while (!(nextAncestor = ancestor.nextSibling) && ancestor.parentNode);
      }
      if (nextAncestor) return (e > a && e < nextAncestor.sourceIndex);
    }

    while (element = element.parentNode)
      if (element == ancestor) return true;
    return false;
  },

  scrollTo: function(element) {
    element = $(element);
    var pos = element.cumulativeOffset();
    window.scrollTo(pos[0], pos[1]);
    return element;
  },

  getStyle: function(element, style) {
    element = $(element);
    style = style == 'float' ? 'cssFloat' : style.camelize();
    var value = element.style[style];
    if (!value) {
      var css = document.defaultView.getComputedStyle(element, null);
      value = css ? css[style] : null;
    }
    if (style == 'opacity') return value ? parseFloat(value) : 1.0;
    return value == 'auto' ? null : value;
  },

  getOpacity: function(element) {
    return $(element).getStyle('opacity');
  },

  setStyle: function(element, styles) {
    element = $(element);
    var elementStyle = element.style, match;
    if (Object.isString(styles)) {
      element.style.cssText += ';' + styles;
      return styles.include('opacity') ?
        element.setOpacity(styles.match(/opacity:\s*(\d?\.?\d*)/)[1]) : element;
    }
    for (var property in styles)
      if (property == 'opacity') element.setOpacity(styles[property]);
      else
        elementStyle[(property == 'float' || property == 'cssFloat') ?
          (elementStyle.styleFloat === undefined ? 'cssFloat' : 'styleFloat') :
            property] = styles[property];

    return element;
  },

  setOpacity: function(element, value) {
    element = $(element);
    element.style.opacity = (value == 1 || value === '') ? '' :
      (value < 0.00001) ? 0 : value;
    return element;
  },

  getDimensions: function(element) {
    element = $(element);
    var display = $(element).getStyle('display');
    if (display != 'none' && display != null) // Safari bug
      return {width: element.offsetWidth, height: element.offsetHeight};

    // All *Width and *Height properties give 0 on elements with display none,
    // so enable the element temporarily
    var els = element.style;
    var originalVisibility = els.visibility;
    var originalPosition = els.position;
    var originalDisplay = els.display;
    els.visibility = 'hidden';
    els.position = 'absolute';
    els.display = 'block';
    var originalWidth = element.clientWidth;
    var originalHeight = element.clientHeight;
    els.display = originalDisplay;
    els.position = originalPosition;
    els.visibility = originalVisibility;
    return {width: originalWidth, height: originalHeight};
  },

  makePositioned: function(element) {
    element = $(element);
    var pos = Element.getStyle(element, 'position');
    if (pos == 'static' || !pos) {
      element._madePositioned = true;
      element.style.position = 'relative';
      // Opera returns the offset relative to the positioning context, when an
      // element is position relative but top and left have not been defined
      if (window.opera) {
        element.style.top = 0;
        element.style.left = 0;
      }
    }
    return element;
  },

  undoPositioned: function(element) {
    element = $(element);
    if (element._madePositioned) {
      element._madePositioned = undefined;
      element.style.position =
        element.style.top =
        element.style.left =
        element.style.bottom =
        element.style.right = '';
    }
    return element;
  },

  makeClipping: function(element) {
    element = $(element);
    if (element._overflow) return element;
    element._overflow = Element.getStyle(element, 'overflow') || 'auto';
    if (element._overflow !== 'hidden')
      element.style.overflow = 'hidden';
    return element;
  },

  undoClipping: function(element) {
    element = $(element);
    if (!element._overflow) return element;
    element.style.overflow = element._overflow == 'auto' ? '' : element._overflow;
    element._overflow = null;
    return element;
  },

  cumulativeOffset: function(element) {
    var valueT = 0, valueL = 0;
    do {
      valueT += element.offsetTop  || 0;
      valueL += element.offsetLeft || 0;
      element = element.offsetParent;
    } while (element);
    return Element._returnOffset(valueL, valueT);
  },

  positionedOffset: function(element) {
    var valueT = 0, valueL = 0;
    do {
      valueT += element.offsetTop  || 0;
      valueL += element.offsetLeft || 0;
      element = element.offsetParent;
      if (element) {
        if (element.tagName == 'BODY') break;
        var p = Element.getStyle(element, 'position');
        if (p == 'relative' || p == 'absolute') break;
      }
    } while (element);
    return Element._returnOffset(valueL, valueT);
  },

  absolutize: function(element) {
    element = $(element);
    if (element.getStyle('position') == 'absolute') return;
    // Position.prepare(); // To be done manually by Scripty when it needs it.

    var offsets = element.positionedOffset();
    var top     = offsets[1];
    var left    = offsets[0];
    var width   = element.clientWidth;
    var height  = element.clientHeight;

    element._originalLeft   = left - parseFloat(element.style.left  || 0);
    element._originalTop    = top  - parseFloat(element.style.top || 0);
    element._originalWidth  = element.style.width;
    element._originalHeight = element.style.height;

    element.style.position = 'absolute';
    element.style.top    = top + 'px';
    element.style.left   = left + 'px';
    element.style.width  = width + 'px';
    element.style.height = height + 'px';
    return element;
  },

  relativize: function(element) {
    element = $(element);
    if (element.getStyle('position') == 'relative') return;
    // Position.prepare(); // To be done manually by Scripty when it needs it.

    element.style.position = 'relative';
    var top  = parseFloat(element.style.top  || 0) - (element._originalTop || 0);
    var left = parseFloat(element.style.left || 0) - (element._originalLeft || 0);

    element.style.top    = top + 'px';
    element.style.left   = left + 'px';
    element.style.height = element._originalHeight;
    element.style.width  = element._originalWidth;
    return element;
  },

  cumulativeScrollOffset: function(element) {
    var valueT = 0, valueL = 0;
    do {
      valueT += element.scrollTop  || 0;
      valueL += element.scrollLeft || 0;
      element = element.parentNode;
    } while (element);
    return Element._returnOffset(valueL, valueT);
  },

  getOffsetParent: function(element) {
    if (element.offsetParent) return $(element.offsetParent);
    if (element == document.body) return $(element);

    while ((element = element.parentNode) && element != document.body)
      if (Element.getStyle(element, 'position') != 'static')
        return $(element);

    return $(document.body);
  },

  viewportOffset: function(forElement) {
    var valueT = 0, valueL = 0;

    var element = forElement;
    do {
      valueT += element.offsetTop  || 0;
      valueL += element.offsetLeft || 0;

      // Safari fix
      if (element.offsetParent == document.body &&
        Element.getStyle(element, 'position') == 'absolute') break;

    } while (element = element.offsetParent);

    element = forElement;
    do {
      if (!Prototype.Browser.Opera || element.tagName == 'BODY') {
        valueT -= element.scrollTop  || 0;
        valueL -= element.scrollLeft || 0;
      }
    } while (element = element.parentNode);

    return Element._returnOffset(valueL, valueT);
  },

  clonePosition: function(element, source) {
    var options = Object.extend({
      setLeft:    true,
      setTop:     true,
      setWidth:   true,
      setHeight:  true,
      offsetTop:  0,
      offsetLeft: 0
    }, arguments[2] || { });

    // find page position of source
    source = $(source);
    var p = source.viewportOffset();

    // find coordinate system to use
    element = $(element);
    var delta = [0, 0];
    var parent = null;
    // delta [0,0] will do fine with position: fixed elements,
    // position:absolute needs offsetParent deltas
    if (Element.getStyle(element, 'position') == 'absolute') {
      parent = element.getOffsetParent();
      delta = parent.viewportOffset();
    }

    // correct by body offsets (fixes Safari)
    if (parent == document.body) {
      delta[0] -= document.body.offsetLeft;
      delta[1] -= document.body.offsetTop;
    }

    // set position
    if (options.setLeft)   element.style.left  = (p[0] - delta[0] + options.offsetLeft) + 'px';
    if (options.setTop)    element.style.top   = (p[1] - delta[1] + options.offsetTop) + 'px';
    if (options.setWidth)  element.style.width = source.offsetWidth + 'px';
    if (options.setHeight) element.style.height = source.offsetHeight + 'px';
    return element;
  }
};

Element.Methods.identify.counter = 1;

Object.extend(Element.Methods, {
  getElementsBySelector: Element.Methods.select,
  childElements: Element.Methods.immediateDescendants
});

Element._attributeTranslations = {
  write: {
    names: {
      className: 'class',
      htmlFor:   'for'
    },
    values: { }
  }
};


if (!document.createRange || Prototype.Browser.Opera) {
  Element.Methods.insert = function(element, insertions) {
    element = $(element);

    if (Object.isString(insertions) || Object.isNumber(insertions) ||
        Object.isElement(insertions) || (insertions && (insertions.toElement || insertions.toHTML)))
          insertions = { bottom: insertions };

    var t = Element._insertionTranslations, content, position, pos, tagName;

    for (position in insertions) {
      content  = insertions[position];
      position = position.toLowerCase();
      pos      = t[position];

      if (content && content.toElement) content = content.toElement();
      if (Object.isElement(content)) {
        pos.insert(element, content);
        continue;
      }

      content = Object.toHTML(content);
      tagName = ((position == 'before' || position == 'after')
        ? element.parentNode : element).tagName.toUpperCase();

      if (t.tags[tagName]) {
        var fragments = Element._getContentFromAnonymousElement(tagName, content.stripScripts());
        if (position == 'top' || position == 'after') fragments.reverse();
        fragments.each(pos.insert.curry(element));
      }
      else element.insertAdjacentHTML(pos.adjacency, content.stripScripts());

      content.evalScripts.bind(content).defer();
    }

    return element;
  };
}

if (Prototype.Browser.Opera) {
  Element.Methods._getStyle = Element.Methods.getStyle;
  Element.Methods.getStyle = function(element, style) {
    switch(style) {
      case 'left':
      case 'top':
      case 'right':
      case 'bottom':
        if (Element._getStyle(element, 'position') == 'static') return null;
      default: return Element._getStyle(element, style);
    }
  };
  Element.Methods._readAttribute = Element.Methods.readAttribute;
  Element.Methods.readAttribute = function(element, attribute) {
    if (attribute == 'title') return element.title;
    return Element._readAttribute(element, attribute);
  };
}

else if (Prototype.Browser.IE) {
  $w('positionedOffset getOffsetParent viewportOffset').each(function(method) {
    Element.Methods[method] = Element.Methods[method].wrap(
      function(proceed, element) {
        element = $(element);
        var position = element.getStyle('position');
        if (position != 'static') return proceed(element);
        element.setStyle({ position: 'relative' });
        var value = proceed(element);
        element.setStyle({ position: position });
        return value;
      }
    );
  });

  Element.Methods.getStyle = function(element, style) {
    element = $(element);
    style = (style == 'float' || style == 'cssFloat') ? 'styleFloat' : style.camelize();
    var value = element.style[style];
    if (!value && element.currentStyle) value = element.currentStyle[style];

    if (style == 'opacity') {
      if (value = (element.getStyle('filter') || '').match(/alpha\(opacity=(.*)\)/))
        if (value[1]) return parseFloat(value[1]) / 100;
      return 1.0;
    }

    if (value == 'auto') {
      if ((style == 'width' || style == 'height') && (element.getStyle('display') != 'none'))
        return element['offset' + style.capitalize()] + 'px';
      return null;
    }
    return value;
  };

  Element.Methods.setOpacity = function(element, value) {
    function stripAlpha(filter){
      return filter.replace(/alpha\([^\)]*\)/gi,'');
    }
    element = $(element);
    var currentStyle = element.currentStyle;
    if ((currentStyle && !currentStyle.hasLayout) ||
      (!currentStyle && element.style.zoom == 'normal'))
        element.style.zoom = 1;

    var filter = element.getStyle('filter'), style = element.style;
    if (value == 1 || value === '') {
      (filter = stripAlpha(filter)) ?
        style.filter = filter : style.removeAttribute('filter');
      return element;
    } else if (value < 0.00001) value = 0;
    style.filter = stripAlpha(filter) +
      'alpha(opacity=' + (value * 100) + ')';
    return element;
  };

  Element._attributeTranslations = {
    read: {
      names: {
        'class': 'className',
        'for':   'htmlFor'
      },
      values: {
        _getAttr: function(element, attribute) {
          return element.getAttribute(attribute, 2);
        },
        _getAttrNode: function(element, attribute) {
          var node = element.getAttributeNode(attribute);
          return node ? node.value : "";
        },
        _getEv: function(element, attribute) {
          var attribute = element.getAttribute(attribute);
          return attribute ? attribute.toString().slice(23, -2) : null;
        },
        _flag: function(element, attribute) {
          return $(element).hasAttribute(attribute) ? attribute : null;
        },
        style: function(element) {
          return element.style.cssText.toLowerCase();
        },
        title: function(element) {
          return element.title;
        }
      }
    }
  };

  Element._attributeTranslations.write = {
    names: Object.clone(Element._attributeTranslations.read.names),
    values: {
      checked: function(element, value) {
        element.checked = !!value;
      },

      style: function(element, value) {
        element.style.cssText = value ? value : '';
      }
    }
  };

  Element._attributeTranslations.has = {};

  $w('colSpan rowSpan vAlign dateTime accessKey tabIndex ' +
      'encType maxLength readOnly longDesc').each(function(attr) {
    Element._attributeTranslations.write.names[attr.toLowerCase()] = attr;
    Element._attributeTranslations.has[attr.toLowerCase()] = attr;
  });

  (function(v) {
    Object.extend(v, {
      href:        v._getAttr,
      src:         v._getAttr,
      type:        v._getAttr,
      action:      v._getAttrNode,
      disabled:    v._flag,
      checked:     v._flag,
      readonly:    v._flag,
      multiple:    v._flag,
      onload:      v._getEv,
      onunload:    v._getEv,
      onclick:     v._getEv,
      ondblclick:  v._getEv,
      onmousedown: v._getEv,
      onmouseup:   v._getEv,
      onmouseover: v._getEv,
      onmousemove: v._getEv,
      onmouseout:  v._getEv,
      onfocus:     v._getEv,
      onblur:      v._getEv,
      onkeypress:  v._getEv,
      onkeydown:   v._getEv,
      onkeyup:     v._getEv,
      onsubmit:    v._getEv,
      onreset:     v._getEv,
      onselect:    v._getEv,
      onchange:    v._getEv
    });
  })(Element._attributeTranslations.read.values);
}

else if (Prototype.Browser.Gecko && /rv:1\.8\.0/.test(navigator.userAgent)) {
  Element.Methods.setOpacity = function(element, value) {
    element = $(element);
    element.style.opacity = (value == 1) ? 0.999999 :
      (value === '') ? '' : (value < 0.00001) ? 0 : value;
    return element;
  };
}

else if (Prototype.Browser.WebKit) {
  Element.Methods.setOpacity = function(element, value) {
    element = $(element);
    element.style.opacity = (value == 1 || value === '') ? '' :
      (value < 0.00001) ? 0 : value;

    if (value == 1)
      if(element.tagName == 'IMG' && element.width) {
        element.width++; element.width--;
      } else try {
        var n = document.createTextNode(' ');
        element.appendChild(n);
        element.removeChild(n);
      } catch (e) { }

    return element;
  };

  // Safari returns margins on body which is incorrect if the child is absolutely
  // positioned.  For performance reasons, redefine Position.cumulativeOffset for
  // KHTML/WebKit only.
  Element.Methods.cumulativeOffset = function(element) {
    var valueT = 0, valueL = 0;
    do {
      valueT += element.offsetTop  || 0;
      valueL += element.offsetLeft || 0;
      if (element.offsetParent == document.body)
        if (Element.getStyle(element, 'position') == 'absolute') break;

      element = element.offsetParent;
    } while (element);

    return Element._returnOffset(valueL, valueT);
  };
}

if (Prototype.Browser.IE || Prototype.Browser.Opera) {
  // IE and Opera are missing .innerHTML support for TABLE-related and SELECT elements
  Element.Methods.update = function(element, content) {
    element = $(element);

    if (content && content.toElement) content = content.toElement();
    if (Object.isElement(content)) return element.update().insert(content);

    content = Object.toHTML(content);
    var tagName = element.tagName.toUpperCase();

    if (tagName in Element._insertionTranslations.tags) {
      $A(element.childNodes).each(function(node) { element.removeChild(node) });
      Element._getContentFromAnonymousElement(tagName, content.stripScripts())
        .each(function(node) { element.appendChild(node) });
    }
    else element.innerHTML = content.stripScripts();
    //else alert(content.stripScripts());

    content.evalScripts.bind(content).defer();
    return element;
  };
}

if (document.createElement('div').outerHTML) {
  Element.Methods.replace = function(element, content) {
    element = $(element);

    if (content && content.toElement) content = content.toElement();
    if (Object.isElement(content)) {
      element.parentNode.replaceChild(content, element);
      return element;
    }

    content = Object.toHTML(content);
    var parent = element.parentNode, tagName = parent.tagName.toUpperCase();

    if (Element._insertionTranslations.tags[tagName]) {
      var nextSibling = element.next();
      var fragments = Element._getContentFromAnonymousElement(tagName, content.stripScripts());
      parent.removeChild(element);
      if (nextSibling)
        fragments.each(function(node) { parent.insertBefore(node, nextSibling) });
      else
        fragments.each(function(node) { parent.appendChild(node) });
    }
    else element.outerHTML = content.stripScripts();

    content.evalScripts.bind(content).defer();
    return element;
  };
}

Element._returnOffset = function(l, t) {
  var result = [l, t];
  result.left = l;
  result.top = t;
  return result;
};

Element._getContentFromAnonymousElement = function(tagName, html) {
  var div = new Element('div'), t = Element._insertionTranslations.tags[tagName];
  div.innerHTML = t[0] + html + t[1];
  t[2].times(function() { div = div.firstChild });
  return $A(div.childNodes);
};

Element._insertionTranslations = {
  before: {
    adjacency: 'beforeBegin',
    insert: function(element, node) {
      element.parentNode.insertBefore(node, element);
    },
    initializeRange: function(element, range) {
      range.setStartBefore(element);
    }
  },
  top: {
    adjacency: 'afterBegin',
    insert: function(element, node) {
      element.insertBefore(node, element.firstChild);
    },
    initializeRange: function(element, range) {
      range.selectNodeContents(element);
      range.collapse(true);
    }
  },
  bottom: {
    adjacency: 'beforeEnd',
    insert: function(element, node) {
      element.appendChild(node);
    }
  },
  after: {
    adjacency: 'afterEnd',
    insert: function(element, node) {
      element.parentNode.insertBefore(node, element.nextSibling);
    },
    initializeRange: function(element, range) {
      range.setStartAfter(element);
    }
  },
  tags: {
    TABLE:  ['<table>',                '</table>',                   1],
    TBODY:  ['<table><tbody>',         '</tbody></table>',           2],
    TR:     ['<table><tbody><tr>',     '</tr></tbody></table>',      3],
    TD:     ['<table><tbody><tr><td>', '</td></tr></tbody></table>', 4],
    SELECT: ['<select>',               '</select>',                  1]
  }
};

(function() {
  this.bottom.initializeRange = this.top.initializeRange;
  Object.extend(this.tags, {
    THEAD: this.tags.TBODY,
    TFOOT: this.tags.TBODY,
    TH:    this.tags.TD
  });
}).call(Element._insertionTranslations);

Element.Methods.Simulated = {
  hasAttribute: function(element, attribute) {
    attribute = Element._attributeTranslations.has[attribute] || attribute;
    var node = $(element).getAttributeNode(attribute);
    return node && node.specified;
  }
};

Element.Methods.ByTag = { };

Object.extend(Element, Element.Methods);

if (!Prototype.BrowserFeatures.ElementExtensions &&
    document.createElement('div').__proto__) {
  window.HTMLElement = { };
  window.HTMLElement.prototype = document.createElement('div').__proto__;
  Prototype.BrowserFeatures.ElementExtensions = true;
}

Element.extend = (function() {
  if (Prototype.BrowserFeatures.SpecificElementExtensions)
    return Prototype.K;

  var Methods = { }, ByTag = Element.Methods.ByTag;

  var extend = Object.extend(function(element) {
    if (!element || element._extendedByPrototype ||
        element.nodeType != 1 || element == window) return element;

    var methods = Object.clone(Methods),
      tagName = element.tagName, property, value;

    // extend methods for specific tags
    if (ByTag[tagName]) Object.extend(methods, ByTag[tagName]);

    for (property in methods) {
      value = methods[property];
      if (Object.isFunction(value) && !(property in element))
        element[property] = value.methodize();
    }

    element._extendedByPrototype = Prototype.emptyFunction;
    return element;

  }, {
    refresh: function() {
      // extend methods for all tags (Safari doesn't need this)
      if (!Prototype.BrowserFeatures.ElementExtensions) {
        Object.extend(Methods, Element.Methods);
        Object.extend(Methods, Element.Methods.Simulated);
      }
    }
  });

  extend.refresh();
  return extend;
})();

Element.hasAttribute = function(element, attribute) {
  if (element.hasAttribute) return element.hasAttribute(attribute);
  return Element.Methods.Simulated.hasAttribute(element, attribute);
};

Element.addMethods = function(methods) {
  var F = Prototype.BrowserFeatures, T = Element.Methods.ByTag;

  if (!methods) {
    Object.extend(Form, Form.Methods);
    Object.extend(Form.Element, Form.Element.Methods);
    Object.extend(Element.Methods.ByTag, {
      "FORM":     Object.clone(Form.Methods),
      "INPUT":    Object.clone(Form.Element.Methods),
      "SELECT":   Object.clone(Form.Element.Methods),
      "TEXTAREA": Object.clone(Form.Element.Methods)
    });
  }

  if (arguments.length == 2) {
    var tagName = methods;
    methods = arguments[1];
  }

  if (!tagName) Object.extend(Element.Methods, methods || { });
  else {
    if (Object.isArray(tagName)) tagName.each(extend);
    else extend(tagName);
  }

  function extend(tagName) {
    tagName = tagName.toUpperCase();
    if (!Element.Methods.ByTag[tagName])
      Element.Methods.ByTag[tagName] = { };
    Object.extend(Element.Methods.ByTag[tagName], methods);
  }

  function copy(methods, destination, onlyIfAbsent) {
    onlyIfAbsent = onlyIfAbsent || false;
    for (var property in methods) {
      var value = methods[property];
      if (!Object.isFunction(value)) continue;
      if (!onlyIfAbsent || !(property in destination))
        destination[property] = value.methodize();
    }
  }

  function findDOMClass(tagName) {
    var klass;
    var trans = {
      "OPTGROUP": "OptGroup", "TEXTAREA": "TextArea", "P": "Paragraph",
      "FIELDSET": "FieldSet", "UL": "UList", "OL": "OList", "DL": "DList",
      "DIR": "Directory", "H1": "Heading", "H2": "Heading", "H3": "Heading",
      "H4": "Heading", "H5": "Heading", "H6": "Heading", "Q": "Quote",
      "INS": "Mod", "DEL": "Mod", "A": "Anchor", "IMG": "Image", "CAPTION":
      "TableCaption", "COL": "TableCol", "COLGROUP": "TableCol", "THEAD":
      "TableSection", "TFOOT": "TableSection", "TBODY": "TableSection", "TR":
      "TableRow", "TH": "TableCell", "TD": "TableCell", "FRAMESET":
      "FrameSet", "IFRAME": "IFrame"
    };
    if (trans[tagName]) klass = 'HTML' + trans[tagName] + 'Element';
    if (window[klass]) return window[klass];
    klass = 'HTML' + tagName + 'Element';
    if (window[klass]) return window[klass];
    klass = 'HTML' + tagName.capitalize() + 'Element';
    if (window[klass]) return window[klass];

    window[klass] = { };
    window[klass].prototype = document.createElement(tagName).__proto__;
    return window[klass];
  }

  if (F.ElementExtensions) {
    copy(Element.Methods, HTMLElement.prototype);
    copy(Element.Methods.Simulated, HTMLElement.prototype, true);
  }

  if (F.SpecificElementExtensions) {
    for (var tag in Element.Methods.ByTag) {
      var klass = findDOMClass(tag);
      if (Object.isUndefined(klass)) continue;
      copy(T[tag], klass.prototype);
    }
  }

  Object.extend(Element, Element.Methods);
  delete Element.ByTag;

  if (Element.extend.refresh) Element.extend.refresh();
  Element.cache = { };
};

document.viewport = {
  getDimensions: function() {
    var dimensions = { };
    $w('width height').each(function(d) {
      var D = d.capitalize();
      dimensions[d] = self['inner' + D] ||
       (document.documentElement['client' + D] || document.body['client' + D]);
    });
    return dimensions;
  },

  getWidth: function() {
    return this.getDimensions().width;
  },

  getHeight: function() {
    return this.getDimensions().height;
  },

  getScrollOffsets: function() {
    return Element._returnOffset(
      window.pageXOffset || document.documentElement.scrollLeft || document.body.scrollLeft,
      window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop);
  }
};
/* Portions of the Selector class are derived from Jack Slocum’s DomQuery,
 * part of YUI-Ext version 0.40, distributed under the terms of an MIT-style
 * license.  Please see http://www.yui-ext.com/ for more information. */

var Selector = Class.create({
  initialize: function(expression) {
    this.expression = expression.strip();
    this.compileMatcher();
  },

  compileMatcher: function() {
    // Selectors with namespaced attributes can't use the XPath version
    if (Prototype.BrowserFeatures.XPath && !(/(\[[\w-]*?:|:checked)/).test(this.expression))
      return this.compileXPathMatcher();

    var e = this.expression, ps = Selector.patterns, h = Selector.handlers,
        c = Selector.criteria, le, p, m;

    if (Selector._cache[e]) {
      this.matcher = Selector._cache[e];
      return;
    }

    this.matcher = ["this.matcher = function(root) {",
                    "var r = root, h = Selector.handlers, c = false, n;"];

    while (e && le != e && (/\S/).test(e)) {
      le = e;
      for (var i in ps) {
        p = ps[i];
        if (m = e.match(p)) {
          this.matcher.push(Object.isFunction(c[i]) ? c[i](m) :
    	      new Template(c[i]).evaluate(m));
          e = e.replace(m[0], '');
          break;
        }
      }
    }

    this.matcher.push("return h.unique(n);\n}");
    eval(this.matcher.join('\n'));
    Selector._cache[this.expression] = this.matcher;
  },

  compileXPathMatcher: function() {
    var e = this.expression, ps = Selector.patterns,
        x = Selector.xpath, le, m;

    if (Selector._cache[e]) {
      this.xpath = Selector._cache[e]; return;
    }

    this.matcher = ['.//*'];
    while (e && le != e && (/\S/).test(e)) {
      le = e;
      for (var i in ps) {
        if (m = e.match(ps[i])) {
          this.matcher.push(Object.isFunction(x[i]) ? x[i](m) :
            new Template(x[i]).evaluate(m));
          e = e.replace(m[0], '');
          break;
        }
      }
    }

    this.xpath = this.matcher.join('');
    Selector._cache[this.expression] = this.xpath;
  },

  findElements: function(root) {
    root = root || document;
    if (this.xpath) return document._getElementsByXPath(this.xpath, root);
    return this.matcher(root);
  },

  match: function(element) {
    this.tokens = [];

    var e = this.expression, ps = Selector.patterns, as = Selector.assertions;
    var le, p, m;

    while (e && le !== e && (/\S/).test(e)) {
      le = e;
      for (var i in ps) {
        p = ps[i];
        if (m = e.match(p)) {
          // use the Selector.assertions methods unless the selector
          // is too complex.
          if (as[i]) {
            this.tokens.push([i, Object.clone(m)]);
            e = e.replace(m[0], '');
          } else {
            // reluctantly do a document-wide search
            // and look for a match in the array
            return this.findElements(document).include(element);
          }
        }
      }
    }

    var match = true, name, matches;
    for (var i = 0, token; token = this.tokens[i]; i++) {
      name = token[0], matches = token[1];
      if (!Selector.assertions[name](element, matches)) {
        match = false; break;
      }
    }

    return match;
  },

  toString: function() {
    return this.expression;
  },

  inspect: function() {
    return "#<Selector:" + this.expression.inspect() + ">";
  }
});

Object.extend(Selector, {
  _cache: { },

  xpath: {
    descendant:   "//*",
    child:        "/*",
    adjacent:     "/following-sibling::*[1]",
    laterSibling: '/following-sibling::*',
    tagName:      function(m) {
      if (m[1] == '*') return '';
      return "[local-name()='" + m[1].toLowerCase() +
             "' or local-name()='" + m[1].toUpperCase() + "']";
    },
    className:    "[contains(concat(' ', @class, ' '), ' #{1} ')]",
    id:           "[@id='#{1}']",
    attrPresence: "[@#{1}]",
    attr: function(m) {
      m[3] = m[5] || m[6];
      return new Template(Selector.xpath.operators[m[2]]).evaluate(m);
    },
    pseudo: function(m) {
      var h = Selector.xpath.pseudos[m[1]];
      if (!h) return '';
      if (Object.isFunction(h)) return h(m);
      return new Template(Selector.xpath.pseudos[m[1]]).evaluate(m);
    },
    operators: {
      '=':  "[@#{1}='#{3}']",
      '!=': "[@#{1}!='#{3}']",
      '^=': "[starts-with(@#{1}, '#{3}')]",
      '$=': "[substring(@#{1}, (string-length(@#{1}) - string-length('#{3}') + 1))='#{3}']",
      '*=': "[contains(@#{1}, '#{3}')]",
      '~=': "[contains(concat(' ', @#{1}, ' '), ' #{3} ')]",
      '|=': "[contains(concat('-', @#{1}, '-'), '-#{3}-')]"
    },
    pseudos: {
      'first-child': '[not(preceding-sibling::*)]',
      'last-child':  '[not(following-sibling::*)]',
      'only-child':  '[not(preceding-sibling::* or following-sibling::*)]',
      'empty':       "[count(*) = 0 and (count(text()) = 0 or translate(text(), ' \t\r\n', '') = '')]",
      'checked':     "[@checked]",
      'disabled':    "[@disabled]",
      'enabled':     "[not(@disabled)]",
      'not': function(m) {
        var e = m[6], p = Selector.patterns,
            x = Selector.xpath, le, m, v;

        var exclusion = [];
        while (e && le != e && (/\S/).test(e)) {
          le = e;
          for (var i in p) {
            if (m = e.match(p[i])) {
              v = Object.isFunction(x[i]) ? x[i](m) : new Template(x[i]).evaluate(m);
              exclusion.push("(" + v.substring(1, v.length - 1) + ")");
              e = e.replace(m[0], '');
              break;
            }
          }
        }
        return "[not(" + exclusion.join(" and ") + ")]";
      },
      'nth-child':      function(m) {
        return Selector.xpath.pseudos.nth("(count(./preceding-sibling::*) + 1) ", m);
      },
      'nth-last-child': function(m) {
        return Selector.xpath.pseudos.nth("(count(./following-sibling::*) + 1) ", m);
      },
      'nth-of-type':    function(m) {
        return Selector.xpath.pseudos.nth("position() ", m);
      },
      'nth-last-of-type': function(m) {
        return Selector.xpath.pseudos.nth("(last() + 1 - position()) ", m);
      },
      'first-of-type':  function(m) {
        m[6] = "1"; return Selector.xpath.pseudos['nth-of-type'](m);
      },
      'last-of-type':   function(m) {
        m[6] = "1"; return Selector.xpath.pseudos['nth-last-of-type'](m);
      },
      'only-of-type':   function(m) {
        var p = Selector.xpath.pseudos; return p['first-of-type'](m) + p['last-of-type'](m);
      },
      nth: function(fragment, m) {
        var mm, formula = m[6], predicate;
        if (formula == 'even') formula = '2n+0';
        if (formula == 'odd')  formula = '2n+1';
        if (mm = formula.match(/^(\d+)$/)) // digit only
          return '[' + fragment + "= " + mm[1] + ']';
        if (mm = formula.match(/^(-?\d*)?n(([+-])(\d+))?/)) { // an+b
          if (mm[1] == "-") mm[1] = -1;
          var a = mm[1] ? Number(mm[1]) : 1;
          var b = mm[2] ? Number(mm[2]) : 0;
          predicate = "[((#{fragment} - #{b}) mod #{a} = 0) and " +
          "((#{fragment} - #{b}) div #{a} >= 0)]";
          return new Template(predicate).evaluate({
            fragment: fragment, a: a, b: b });
        }
      }
    }
  },

  criteria: {
    tagName:      'n = h.tagName(n, r, "#{1}", c);   c = false;',
    className:    'n = h.className(n, r, "#{1}", c); c = false;',
    id:           'n = h.id(n, r, "#{1}", c);        c = false;',
    attrPresence: 'n = h.attrPresence(n, r, "#{1}"); c = false;',
    attr: function(m) {
      m[3] = (m[5] || m[6]);
      return new Template('n = h.attr(n, r, "#{1}", "#{3}", "#{2}"); c = false;').evaluate(m);
    },
    pseudo: function(m) {
      if (m[6]) m[6] = m[6].replace(/"/g, '\\"');
      return new Template('n = h.pseudo(n, "#{1}", "#{6}", r, c); c = false;').evaluate(m);
    },
    descendant:   'c = "descendant";',
    child:        'c = "child";',
    adjacent:     'c = "adjacent";',
    laterSibling: 'c = "laterSibling";'
  },

  patterns: {
    // combinators must be listed first
    // (and descendant needs to be last combinator)
    laterSibling: /^\s*~\s*/,
    child:        /^\s*>\s*/,
    adjacent:     /^\s*\+\s*/,
    descendant:   /^\s/,

    // selectors follow
    tagName:      /^\s*(\*|[\w\-]+)(\b|$)?/,
    id:           /^#([\w\-\*]+)(\b|$)/,
    className:    /^\.([\w\-\*]+)(\b|$)/,
    pseudo:       /^:((first|last|nth|nth-last|only)(-child|-of-type)|empty|checked|(en|dis)abled|not)(\((.*?)\))?(\b|$|(?=\s)|(?=:))/,
    attrPresence: /^\[([\w]+)\]/,
    attr:         /\[((?:[\w-]*:)?[\w-]+)\s*(?:([!^$*~|]?=)\s*((['"])([^\4]*?)\4|([^'"][^\]]*?)))?\]/
  },

  // for Selector.match and Element#match
  assertions: {
    tagName: function(element, matches) {
      return matches[1].toUpperCase() == element.tagName.toUpperCase();
    },

    className: function(element, matches) {
      return Element.hasClassName(element, matches[1]);
    },

    id: function(element, matches) {
      return element.id === matches[1];
    },

    attrPresence: function(element, matches) {
      return Element.hasAttribute(element, matches[1]);
    },

    attr: function(element, matches) {
      var nodeValue = Element.readAttribute(element, matches[1]);
      return Selector.operators[matches[2]](nodeValue, matches[3]);
    }
  },

  handlers: {
    // UTILITY FUNCTIONS
    // joins two collections
    concat: function(a, b) {
      for (var i = 0, node; node = b[i]; i++)
        a.push(node);
      return a;
    },

    // marks an array of nodes for counting
    mark: function(nodes) {
      for (var i = 0, node; node = nodes[i]; i++)
        node._counted = true;
      return nodes;
    },

    unmark: function(nodes) {
      for (var i = 0, node; node = nodes[i]; i++)
        node._counted = undefined;
      return nodes;
    },

    // mark each child node with its position (for nth calls)
    // "ofType" flag indicates whether we're indexing for nth-of-type
    // rather than nth-child
    index: function(parentNode, reverse, ofType) {
      parentNode._counted = true;
      if (reverse) {
        for (var nodes = parentNode.childNodes, i = nodes.length - 1, j = 1; i >= 0; i--) {
          var node = nodes[i];
          if (node.nodeType == 1 && (!ofType || node._counted)) node.nodeIndex = j++;
        }
      } else {
        for (var i = 0, j = 1, nodes = parentNode.childNodes; node = nodes[i]; i++)
          if (node.nodeType == 1 && (!ofType || node._counted)) node.nodeIndex = j++;
      }
    },

    // filters out duplicates and extends all nodes
    unique: function(nodes) {
      if (nodes.length == 0) return nodes;
      var results = [], n;
      for (var i = 0, l = nodes.length; i < l; i++)
        if (!(n = nodes[i])._counted) {
          n._counted = true;
          results.push(Element.extend(n));
        }
      return Selector.handlers.unmark(results);
    },

    // COMBINATOR FUNCTIONS
    descendant: function(nodes) {
      var h = Selector.handlers;
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        h.concat(results, node.getElementsByTagName('*'));
      return results;
    },

    child: function(nodes) {
      var h = Selector.handlers;
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
        for (var j = 0, children = [], child; child = node.childNodes[j]; j++)
          if (child.nodeType == 1 && child.tagName != '!') results.push(child);
      }
      return results;
    },

    adjacent: function(nodes) {
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
        var next = this.nextElementSibling(node);
        if (next) results.push(next);
      }
      return results;
    },

    laterSibling: function(nodes) {
      var h = Selector.handlers;
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        h.concat(results, Element.nextSiblings(node));
      return results;
    },

    nextElementSibling: function(node) {
      while (node = node.nextSibling)
	      if (node.nodeType == 1) return node;
      return null;
    },

    previousElementSibling: function(node) {
      while (node = node.previousSibling)
        if (node.nodeType == 1) return node;
      return null;
    },

    // TOKEN FUNCTIONS
    tagName: function(nodes, root, tagName, combinator) {
      tagName = tagName.toUpperCase();
      var results = [], h = Selector.handlers;
      if (nodes) {
        if (combinator) {
          // fastlane for ordinary descendant combinators
          if (combinator == "descendant") {
            for (var i = 0, node; node = nodes[i]; i++)
              h.concat(results, node.getElementsByTagName(tagName));
            return results;
          } else nodes = this[combinator](nodes);
          if (tagName == "*") return nodes;
        }
        for (var i = 0, node; node = nodes[i]; i++)
          if (node.tagName.toUpperCase() == tagName) results.push(node);
        return results;
      } else return root.getElementsByTagName(tagName);
    },

    id: function(nodes, root, id, combinator) {
      var targetNode = $(id), h = Selector.handlers;
      if (!targetNode) return [];
      if (!nodes && root == document) return [targetNode];
      if (nodes) {
        if (combinator) {
          if (combinator == 'child') {
            for (var i = 0, node; node = nodes[i]; i++)
              if (targetNode.parentNode == node) return [targetNode];
          } else if (combinator == 'descendant') {
            for (var i = 0, node; node = nodes[i]; i++)
              if (Element.descendantOf(targetNode, node)) return [targetNode];
          } else if (combinator == 'adjacent') {
            for (var i = 0, node; node = nodes[i]; i++)
              if (Selector.handlers.previousElementSibling(targetNode) == node)
                return [targetNode];
          } else nodes = h[combinator](nodes);
        }
        for (var i = 0, node; node = nodes[i]; i++)
          if (node == targetNode) return [targetNode];
        return [];
      }
      return (targetNode && Element.descendantOf(targetNode, root)) ? [targetNode] : [];
    },

    className: function(nodes, root, className, combinator) {
      if (nodes && combinator) nodes = this[combinator](nodes);
      return Selector.handlers.byClassName(nodes, root, className);
    },

    byClassName: function(nodes, root, className) {
      if (!nodes) nodes = Selector.handlers.descendant([root]);
      var needle = ' ' + className + ' ';
      for (var i = 0, results = [], node, nodeClassName; node = nodes[i]; i++) {
        nodeClassName = node.className;
        if (nodeClassName.length == 0) continue;
        if (nodeClassName == className || (' ' + nodeClassName + ' ').include(needle))
          results.push(node);
      }
      return results;
    },

    attrPresence: function(nodes, root, attr) {
      if (!nodes) nodes = root.getElementsByTagName("*");
      var results = [];
      for (var i = 0, node; node = nodes[i]; i++)
        if (Element.hasAttribute(node, attr)) results.push(node);
      return results;
    },

    attr: function(nodes, root, attr, value, operator) {
      if (!nodes) nodes = root.getElementsByTagName("*");
      var handler = Selector.operators[operator], results = [];
      for (var i = 0, node; node = nodes[i]; i++) {
        var nodeValue = Element.readAttribute(node, attr);
        if (nodeValue === null) continue;
        if (handler(nodeValue, value)) results.push(node);
      }
      return results;
    },

    pseudo: function(nodes, name, value, root, combinator) {
      if (nodes && combinator) nodes = this[combinator](nodes);
      if (!nodes) nodes = root.getElementsByTagName("*");
      return Selector.pseudos[name](nodes, value, root);
    }
  },

  pseudos: {
    'first-child': function(nodes, value, root) {
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
        if (Selector.handlers.previousElementSibling(node)) continue;
          results.push(node);
      }
      return results;
    },
    'last-child': function(nodes, value, root) {
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
        if (Selector.handlers.nextElementSibling(node)) continue;
          results.push(node);
      }
      return results;
    },
    'only-child': function(nodes, value, root) {
      var h = Selector.handlers;
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        if (!h.previousElementSibling(node) && !h.nextElementSibling(node))
          results.push(node);
      return results;
    },
    'nth-child':        function(nodes, formula, root) {
      return Selector.pseudos.nth(nodes, formula, root);
    },
    'nth-last-child':   function(nodes, formula, root) {
      return Selector.pseudos.nth(nodes, formula, root, true);
    },
    'nth-of-type':      function(nodes, formula, root) {
      return Selector.pseudos.nth(nodes, formula, root, false, true);
    },
    'nth-last-of-type': function(nodes, formula, root) {
      return Selector.pseudos.nth(nodes, formula, root, true, true);
    },
    'first-of-type':    function(nodes, formula, root) {
      return Selector.pseudos.nth(nodes, "1", root, false, true);
    },
    'last-of-type':     function(nodes, formula, root) {
      return Selector.pseudos.nth(nodes, "1", root, true, true);
    },
    'only-of-type':     function(nodes, formula, root) {
      var p = Selector.pseudos;
      return p['last-of-type'](p['first-of-type'](nodes, formula, root), formula, root);
    },

    // handles the an+b logic
    getIndices: function(a, b, total) {
      if (a == 0) return b > 0 ? [b] : [];
      return $R(1, total).inject([], function(memo, i) {
        if (0 == (i - b) % a && (i - b) / a >= 0) memo.push(i);
        return memo;
      });
    },

    // handles nth(-last)-child, nth(-last)-of-type, and (first|last)-of-type
    nth: function(nodes, formula, root, reverse, ofType) {
      if (nodes.length == 0) return [];
      if (formula == 'even') formula = '2n+0';
      if (formula == 'odd')  formula = '2n+1';
      var h = Selector.handlers, results = [], indexed = [], m;
      h.mark(nodes);
      for (var i = 0, node; node = nodes[i]; i++) {
        if (!node.parentNode._counted) {
          h.index(node.parentNode, reverse, ofType);
          indexed.push(node.parentNode);
        }
      }
      if (formula.match(/^\d+$/)) { // just a number
        formula = Number(formula);
        for (var i = 0, node; node = nodes[i]; i++)
          if (node.nodeIndex == formula) results.push(node);
      } else if (m = formula.match(/^(-?\d*)?n(([+-])(\d+))?/)) { // an+b
        if (m[1] == "-") m[1] = -1;
        var a = m[1] ? Number(m[1]) : 1;
        var b = m[2] ? Number(m[2]) : 0;
        var indices = Selector.pseudos.getIndices(a, b, nodes.length);
        for (var i = 0, node, l = indices.length; node = nodes[i]; i++) {
          for (var j = 0; j < l; j++)
            if (node.nodeIndex == indices[j]) results.push(node);
        }
      }
      h.unmark(nodes);
      h.unmark(indexed);
      return results;
    },

    'empty': function(nodes, value, root) {
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
        // IE treats comments as element nodes
        if (node.tagName == '!' || (node.firstChild && !node.innerHTML.match(/^\s*$/))) continue;
        results.push(node);
      }
      return results;
    },

    'not': function(nodes, selector, root) {
      var h = Selector.handlers, selectorType, m;
      var exclusions = new Selector(selector).findElements(root);
      h.mark(exclusions);
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        if (!node._counted) results.push(node);
      h.unmark(exclusions);
      return results;
    },

    'enabled': function(nodes, value, root) {
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        if (!node.disabled) results.push(node);
      return results;
    },

    'disabled': function(nodes, value, root) {
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        if (node.disabled) results.push(node);
      return results;
    },

    'checked': function(nodes, value, root) {
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        if (node.checked) results.push(node);
      return results;
    }
  },

  operators: {
    '=':  function(nv, v) { return nv == v; },
    '!=': function(nv, v) { return nv != v; },
    '^=': function(nv, v) { return nv.startsWith(v); },
    '$=': function(nv, v) { return nv.endsWith(v); },
    '*=': function(nv, v) { return nv.include(v); },
    '~=': function(nv, v) { return (' ' + nv + ' ').include(' ' + v + ' '); },
    '|=': function(nv, v) { return ('-' + nv.toUpperCase() + '-').include('-' + v.toUpperCase() + '-'); }
  },

  matchElements: function(elements, expression) {
    var matches = new Selector(expression).findElements(), h = Selector.handlers;
    h.mark(matches);
    for (var i = 0, results = [], element; element = elements[i]; i++)
      if (element._counted) results.push(element);
    h.unmark(matches);
    return results;
  },

  findElement: function(elements, expression, index) {
    if (Object.isNumber(expression)) {
      index = expression; expression = false;
    }
    return Selector.matchElements(elements, expression || '*')[index || 0];
  },

  findChildElements: function(element, expressions) {
    var exprs = expressions.join(','), expressions = [];
    exprs.scan(/(([\w#:.~>+()\s-]+|\*|\[.*?\])+)\s*(,|$)/, function(m) {
      expressions.push(m[1].strip());
    });
    var results = [], h = Selector.handlers;
    for (var i = 0, l = expressions.length, selector; i < l; i++) {
      selector = new Selector(expressions[i].strip());
      h.concat(results, selector.findElements(element));
    }
    return (l > 1) ? h.unique(results) : results;
  }
});

function $$() {
  return Selector.findChildElements(document, $A(arguments));
}
var Form = {
  reset: function(form) {
    $(form).reset();
    return form;
  },

  serializeElements: function(elements, options) {
    if (typeof options != 'object') options = { hash: !!options };
    else if (options.hash === undefined) options.hash = true;
    var key, value, submitted = false, submit = options.submit;

    var data = elements.inject({ }, function(result, element) {
      if (!element.disabled && element.name) {
        key = element.name; value = $(element).getValue();
        if (value != null && (element.type != 'submit' || (!submitted &&
            submit !== false && (!submit || key == submit) && (submitted = true)))) {
          if (key in result) {
            // a key is already present; construct an array of values
            if (!Object.isArray(result[key])) result[key] = [result[key]];
            result[key].push(value);
          }
          else result[key] = value;
        }
      }
      return result;
    });

    return options.hash ? data : Object.toQueryString(data);
  }
};

Form.Methods = {
  serialize: function(form, options) {
    return Form.serializeElements(Form.getElements(form), options);
  },

  getElements: function(form) {
    return $A($(form).getElementsByTagName('*')).inject([],
      function(elements, child) {
        if (Form.Element.Serializers[child.tagName.toLowerCase()])
          elements.push(Element.extend(child));
        return elements;
      }
    );
  },

  getInputs: function(form, typeName, name) {
    form = $(form);
    var inputs = form.getElementsByTagName('input');

    if (!typeName && !name) return $A(inputs).map(Element.extend);

    for (var i = 0, matchingInputs = [], length = inputs.length; i < length; i++) {
      var input = inputs[i];
      if ((typeName && input.type != typeName) || (name && input.name != name))
        continue;
      matchingInputs.push(Element.extend(input));
    }

    return matchingInputs;
  },

  disable: function(form) {
    form = $(form);
    Form.getElements(form).invoke('disable');
    return form;
  },

  enable: function(form) {
    form = $(form);
    Form.getElements(form).invoke('enable');
    return form;
  },

  findFirstElement: function(form) {
    var elements = $(form).getElements().findAll(function(element) {
      return 'hidden' != element.type && !element.disabled;
    });
    var firstByIndex = elements.findAll(function(element) {
      return element.hasAttribute('tabIndex') && element.tabIndex >= 0;
    }).sortBy(function(element) { return element.tabIndex }).first();

    return firstByIndex ? firstByIndex : elements.find(function(element) {
      return ['input', 'select', 'textarea'].include(element.tagName.toLowerCase());
    });
  },

  focusFirstElement: function(form) {
    form = $(form);
    form.findFirstElement().activate();
    return form;
  },

  request: function(form, options) {
    form = $(form), options = Object.clone(options || { });

    var params = options.parameters, action = form.readAttribute('action') || '';
    if (action.blank()) action = window.location.href;
    options.parameters = form.serialize(true);

    if (params) {
      if (Object.isString(params)) params = params.toQueryParams();
      Object.extend(options.parameters, params);
    }

    if (form.hasAttribute('method') && !options.method)
      options.method = form.method;

    return new Ajax.Request(action, options);
  }
};

/*--------------------------------------------------------------------------*/

Form.Element = {
  focus: function(element) {
    $(element).focus();
    return element;
  },

  select: function(element) {
    $(element).select();
    return element;
  }
};

Form.Element.Methods = {
  serialize: function(element) {
    element = $(element);
    if (!element.disabled && element.name) {
      var value = element.getValue();
      if (value != undefined) {
        var pair = { };
        pair[element.name] = value;
        return Object.toQueryString(pair);
      }
    }
    return '';
  },

  getValue: function(element) {
    element = $(element);
    var method = element.tagName.toLowerCase();
    return Form.Element.Serializers[method](element);
  },

  setValue: function(element, value) {
    element = $(element);
    var method = element.tagName.toLowerCase();
    Form.Element.Serializers[method](element, value);
    return element;
  },

  clear: function(element) {
    $(element).value = '';
    return element;
  },

  present: function(element) {
    return $(element).value != '';
  },

  activate: function(element) {
    element = $(element);
    try {
      element.focus();
      if (element.select && (element.tagName.toLowerCase() != 'input' ||
          !['button', 'reset', 'submit'].include(element.type)))
        element.select();
    } catch (e) { }
    return element;
  },

  disable: function(element) {
    element = $(element);
    element.blur();
    element.disabled = true;
    return element;
  },

  enable: function(element) {
    element = $(element);
    element.disabled = false;
    return element;
  }
};

/*--------------------------------------------------------------------------*/

var Field = Form.Element;
var $F = Form.Element.Methods.getValue;

/*--------------------------------------------------------------------------*/

Form.Element.Serializers = {
  input: function(element, value) {
    switch (element.type.toLowerCase()) {
      case 'checkbox':
      case 'radio':
        return Form.Element.Serializers.inputSelector(element, value);
      default:
        return Form.Element.Serializers.textarea(element, value);
    }
  },

  inputSelector: function(element, value) {
    if (value === undefined) return element.checked ? element.value : null;
    else element.checked = !!value;
  },

  textarea: function(element, value) {
    if (value === undefined) return element.value;
    else element.value = value;
  },

  select: function(element, index) {
    if (index === undefined)
      return this[element.type == 'select-one' ?
        'selectOne' : 'selectMany'](element);
    else {
      var opt, value, single = !Object.isArray(index);
      for (var i = 0, length = element.length; i < length; i++) {
        opt = element.options[i];
        value = this.optionValue(opt);
        if (single) {
          if (value == index) {
            opt.selected = true;
            return;
          }
        }
        else opt.selected = index.include(value);
      }
    }
  },

  selectOne: function(element) {
    var index = element.selectedIndex;
    return index >= 0 ? this.optionValue(element.options[index]) : null;
  },

  selectMany: function(element) {
    var values, length = element.length;
    if (!length) return null;

    for (var i = 0, values = []; i < length; i++) {
      var opt = element.options[i];
      if (opt.selected) values.push(this.optionValue(opt));
    }
    return values;
  },

  optionValue: function(opt) {
    // extend element because hasAttribute may not be native
    return Element.extend(opt).hasAttribute('value') ? opt.value : opt.text;
  }
};

/*--------------------------------------------------------------------------*/

Abstract.TimedObserver = Class.create(PeriodicalExecuter, {
  initialize: function($super, element, frequency, callback) {
    $super(callback, frequency);
    this.element   = $(element);
    this.lastValue = this.getValue();
  },

  execute: function() {
    var value = this.getValue();
    if (Object.isString(this.lastValue) && Object.isString(value) ?
        this.lastValue != value : String(this.lastValue) != String(value)) {
      this.callback(this.element, value);
      this.lastValue = value;
    }
  }
});

Form.Element.Observer = Class.create(Abstract.TimedObserver, {
  getValue: function() {
    return Form.Element.getValue(this.element);
  }
});

Form.Observer = Class.create(Abstract.TimedObserver, {
  getValue: function() {
    return Form.serialize(this.element);
  }
});

/*--------------------------------------------------------------------------*/

Abstract.EventObserver = Class.create({
  initialize: function(element, callback) {
    this.element  = $(element);
    this.callback = callback;

    this.lastValue = this.getValue();
    if (this.element.tagName.toLowerCase() == 'form')
      this.registerFormCallbacks();
    else
      this.registerCallback(this.element);
  },

  onElementEvent: function() {
    var value = this.getValue();
    if (this.lastValue != value) {
      this.callback(this.element, value);
      this.lastValue = value;
    }
  },

  registerFormCallbacks: function() {
    Form.getElements(this.element).each(this.registerCallback, this);
  },

  registerCallback: function(element) {
    if (element.type) {
      switch (element.type.toLowerCase()) {
        case 'checkbox':
        case 'radio':
          Event.observe(element, 'click', this.onElementEvent.bind(this));
          break;
        default:
          Event.observe(element, 'change', this.onElementEvent.bind(this));
          break;
      }
    }
  }
});

Form.Element.EventObserver = Class.create(Abstract.EventObserver, {
  getValue: function() {
    return Form.Element.getValue(this.element);
  }
});

Form.EventObserver = Class.create(Abstract.EventObserver, {
  getValue: function() {
    return Form.serialize(this.element);
  }
});
if (!window.Event) var Event = { };

Object.extend(Event, {
  KEY_BACKSPACE: 8,
  KEY_TAB:       9,
  KEY_RETURN:   13,
  KEY_ESC:      27,
  KEY_LEFT:     37,
  KEY_UP:       38,
  KEY_RIGHT:    39,
  KEY_DOWN:     40,
  KEY_DELETE:   46,
  KEY_HOME:     36,
  KEY_END:      35,
  KEY_PAGEUP:   33,
  KEY_PAGEDOWN: 34,
  KEY_INSERT:   45,

  cache: { },

  relatedTarget: function(event) {
    var element;
    switch(event.type) {
      case 'mouseover': element = event.fromElement; break;
      case 'mouseout':  element = event.toElement;   break;
      default: return null;
    }
    return Element.extend(element);
  }
});

Event.Methods = (function() {
  var isButton;

  if (Prototype.Browser.IE) {
    var buttonMap = { 0: 1, 1: 4, 2: 2 };
    isButton = function(event, code) {
      return event.button == buttonMap[code];
    };

  } else if (Prototype.Browser.WebKit) {
    isButton = function(event, code) {
      switch (code) {
        case 0: return event.which == 1 && !event.metaKey;
        case 1: return event.which == 1 && event.metaKey;
        default: return false;
      }
    };

  } else {
    isButton = function(event, code) {
      return event.which ? (event.which === code + 1) : (event.button === code);
    };
  }

  return {
    isLeftClick:   function(event) { return isButton(event, 0) },
    isMiddleClick: function(event) { return isButton(event, 1) },
    isRightClick:  function(event) { return isButton(event, 2) },

    element: function(event) {
      var node = Event.extend(event).target;
      return Element.extend(node.nodeType == Node.TEXT_NODE ? node.parentNode : node);
    },

    findElement: function(event, expression) {
      var element = Event.element(event);
      return element.match(expression) ? element : element.up(expression);
    },

    pointer: function(event) {
      return {
        x: event.pageX || (event.clientX +
          (document.documentElement.scrollLeft || document.body.scrollLeft)),
        y: event.pageY || (event.clientY +
          (document.documentElement.scrollTop || document.body.scrollTop))
      };
    },

    pointerX: function(event) { return Event.pointer(event).x },
    pointerY: function(event) { return Event.pointer(event).y },

    stop: function(event) {
      Event.extend(event);
      event.preventDefault();
      event.stopPropagation();
      event.stopped = true;
    }
  };
})();

Event.extend = (function() {
  var methods = Object.keys(Event.Methods).inject({ }, function(m, name) {
    m[name] = Event.Methods[name].methodize();
    return m;
  });

  if (Prototype.Browser.IE) {
    Object.extend(methods, {
      stopPropagation: function() { this.cancelBubble = true },
      preventDefault:  function() { this.returnValue = false },
      inspect: function() { return "[object Event]" }
    });

    return function(event) {
      if (!event) return false;
      if (event._extendedByPrototype) return event;

      event._extendedByPrototype = Prototype.emptyFunction;
      var pointer = Event.pointer(event);
      Object.extend(event, {
        target: event.srcElement,
        relatedTarget: Event.relatedTarget(event),
        pageX:  pointer.x,
        pageY:  pointer.y
      });
      return Object.extend(event, methods);
    };

  } else {
    Event.prototype = Event.prototype || document.createEvent("HTMLEvents").__proto__;
    Object.extend(Event.prototype, methods);
    return Prototype.K;
  }
})();

Object.extend(Event, (function() {
  var cache = Event.cache;

  function getEventID(element) {
    if (element._eventID) return element._eventID;
    arguments.callee.id = arguments.callee.id || 1;
    return element._eventID = ++arguments.callee.id;
  }

  function getDOMEventName(eventName) {
    if (eventName && eventName.include(':')) return "dataavailable";
    return eventName;
  }

  function getCacheForID(id) {
    return cache[id] = cache[id] || { };
  }

  function getWrappersForEventName(id, eventName) {
    var c = getCacheForID(id);
    return c[eventName] = c[eventName] || [];
  }

  function createWrapper(element, eventName, handler) {
    var id = getEventID(element);
    var c = getWrappersForEventName(id, eventName);
    if (c.pluck("handler").include(handler)) return false;

    var wrapper = function(event) {
      if (!Event || !Event.extend ||
        (event.eventName && event.eventName != eventName))
          return false;

      Event.extend(event);
      handler.call(element, event)
    };

    wrapper.handler = handler;
    c.push(wrapper);
    return wrapper;
  }

  function findWrapper(id, eventName, handler) {
    var c = getWrappersForEventName(id, eventName);
    return c.find(function(wrapper) { return wrapper.handler == handler });
  }

  function destroyWrapper(id, eventName, handler) {
    var c = getCacheForID(id);
    if (!c[eventName]) return false;
    c[eventName] = c[eventName].without(findWrapper(id, eventName, handler));
  }

  function destroyCache() {
    for (var id in cache)
      for (var eventName in cache[id])
        cache[id][eventName] = null;
  }

  if (window.attachEvent) {
    window.attachEvent("onunload", destroyCache);
  }

  return {
    observe: function(element, eventName, handler) {
      element = $(element);
      var name = getDOMEventName(eventName);

      var wrapper = createWrapper(element, eventName, handler);
      if (!wrapper) return element;

      if (element.addEventListener) {
        element.addEventListener(name, wrapper, false);
      } else {
        element.attachEvent("on" + name, wrapper);
      }

      return element;
    },

    stopObserving: function(element, eventName, handler) {
      element = $(element);
      var id = getEventID(element), name = getDOMEventName(eventName);

      if (!handler && eventName) {
        getWrappersForEventName(id, eventName).each(function(wrapper) {
          element.stopObserving(eventName, wrapper.handler);
        });
        return element;

      } else if (!eventName) {
        Object.keys(getCacheForID(id)).each(function(eventName) {
          element.stopObserving(eventName);
        });
        return element;
      }

      var wrapper = findWrapper(id, eventName, handler);
      if (!wrapper) return element;

      if (element.removeEventListener) {
        element.removeEventListener(name, wrapper, false);
      } else {
        element.detachEvent("on" + name, wrapper);
      }

      destroyWrapper(id, eventName, handler);

      return element;
    },

    fire: function(element, eventName, memo) {
      element = $(element);
      if (element == document && document.createEvent && !element.dispatchEvent)
        element = document.documentElement;

      if (document.createEvent) {
        var event = document.createEvent("HTMLEvents");
        event.initEvent("dataavailable", true, true);
      } else {
        var event = document.createEventObject();
        event.eventType = "ondataavailable";
      }

      event.eventName = eventName;
      event.memo = memo || { };

      if (document.createEvent) {
        element.dispatchEvent(event);
      } else {
        element.fireEvent(event.eventType, event);
      }

      return event;
    }
  };
})());

Object.extend(Event, Event.Methods);

Element.addMethods({
  fire:          Event.fire,
  observe:       Event.observe,
  stopObserving: Event.stopObserving
});

Object.extend(document, {
  fire:          Element.Methods.fire.methodize(),
  observe:       Element.Methods.observe.methodize(),
  stopObserving: Element.Methods.stopObserving.methodize()
});

(function() {
  /* Support for the DOMContentLoaded event is based on work by Dan Webb,
     Matthias Miller, Dean Edwards and John Resig. */

  var timer, fired = false;

  function fireContentLoadedEvent() {
    if (fired) return;
    if (timer) window.clearInterval(timer);
    document.fire("dom:loaded");
    fired = true;
  }

  if (document.addEventListener) {
    if (Prototype.Browser.WebKit) {
      timer = window.setInterval(function() {
        if (/loaded|complete/.test(document.readyState))
          fireContentLoadedEvent();
      }, 0);

      Event.observe(window, "load", fireContentLoadedEvent);

    } else {
      document.addEventListener("DOMContentLoaded",
        fireContentLoadedEvent, false);
    }

  } else {
    document.write("<script id=__onDOMContentLoaded defer src=//:><\/script>");
    $("__onDOMContentLoaded").onreadystatechange = function() {
      if (this.readyState == "complete") {
        this.onreadystatechange = null;
        fireContentLoadedEvent();
      }
    };
  }
})();
/*------------------------------- DEPRECATED -------------------------------*/

Hash.toQueryString = Object.toQueryString;

var Toggle = { display: Element.toggle };

Element.Methods.childOf = Element.Methods.descendantOf;

var Insertion = {
  Before: function(element, content) {
    return Element.insert(element, {before:content});
  },

  Top: function(element, content) {
    return Element.insert(element, {top:content});
  },

  Bottom: function(element, content) {
    return Element.insert(element, {bottom:content});
  },

  After: function(element, content) {
    return Element.insert(element, {after:content});
  }
};

var $continue = new Error('"throw $continue" is deprecated, use "return" instead');

// This should be moved to script.aculo.us; notice the deprecated methods
// further below, that map to the newer Element methods.
var Position = {
  // set to true if needed, warning: firefox performance problems
  // NOT neeeded for page scrolling, only if draggable contained in
  // scrollable elements
  includeScrollOffsets: false,

  // must be called before calling withinIncludingScrolloffset, every time the
  // page is scrolled
  prepare: function() {
    this.deltaX =  window.pageXOffset
                || document.documentElement.scrollLeft
                || document.body.scrollLeft
                || 0;
    this.deltaY =  window.pageYOffset
                || document.documentElement.scrollTop
                || document.body.scrollTop
                || 0;
  },

  // caches x/y coordinate pair to use with overlap
  within: function(element, x, y) {
    if (this.includeScrollOffsets)
      return this.withinIncludingScrolloffsets(element, x, y);
    this.xcomp = x;
    this.ycomp = y;
    this.offset = Element.cumulativeOffset(element);

    return (y >= this.offset[1] &&
            y <  this.offset[1] + element.offsetHeight &&
            x >= this.offset[0] &&
            x <  this.offset[0] + element.offsetWidth);
  },

  withinIncludingScrolloffsets: function(element, x, y) {
    var offsetcache = Element.cumulativeScrollOffset(element);

    this.xcomp = x + offsetcache[0] - this.deltaX;
    this.ycomp = y + offsetcache[1] - this.deltaY;
    this.offset = Element.cumulativeOffset(element);

    return (this.ycomp >= this.offset[1] &&
            this.ycomp <  this.offset[1] + element.offsetHeight &&
            this.xcomp >= this.offset[0] &&
            this.xcomp <  this.offset[0] + element.offsetWidth);
  },

  // within must be called directly before
  overlap: function(mode, element) {
    if (!mode) return 0;
    if (mode == 'vertical')
      return ((this.offset[1] + element.offsetHeight) - this.ycomp) /
        element.offsetHeight;
    if (mode == 'horizontal')
      return ((this.offset[0] + element.offsetWidth) - this.xcomp) /
        element.offsetWidth;
  },

  // Deprecation layer -- use newer Element methods now (1.5.2).

  cumulativeOffset: Element.Methods.cumulativeOffset,

  positionedOffset: Element.Methods.positionedOffset,

  absolutize: function(element) {
    Position.prepare();
    return Element.absolutize(element);
  },

  relativize: function(element) {
    Position.prepare();
    return Element.relativize(element);
  },

  realOffset: Element.Methods.cumulativeScrollOffset,

  offsetParent: Element.Methods.getOffsetParent,

  page: Element.Methods.viewportOffset,

  clone: function(source, target, options) {
    options = options || { };
    return Element.clonePosition(target, source, options);
  }
};

/*--------------------------------------------------------------------------*/

if (!document.getElementsByClassName) document.getElementsByClassName = function(instanceMethods){
  function iter(name) {
    return name.blank() ? null : "[contains(concat(' ', @class, ' '), ' " + name + " ')]";
  }

  instanceMethods.getElementsByClassName = Prototype.BrowserFeatures.XPath ?
  function(element, className) {
    className = className.toString().strip();
    var cond = /\s/.test(className) ? $w(className).map(iter).join('') : iter(className);
    return cond ? document._getElementsByXPath('.//*' + cond, element) : [];
  } : function(element, className) {
    className = className.toString().strip();
    var elements = [], classNames = (/\s/.test(className) ? $w(className) : null);
    if (!classNames && !className) return elements;

    var nodes = $(element).getElementsByTagName('*');
    className = ' ' + className + ' ';

    for (var i = 0, child, cn; child = nodes[i]; i++) {
      if (child.className && (cn = ' ' + child.className + ' ') && (cn.include(className) ||
          (classNames && classNames.all(function(name) {
            return !name.toString().blank() && cn.include(' ' + name + ' ');
          }))))
        elements.push(Element.extend(child));
    }
    return elements;
  };

  return function(className, parentElement) {
    return $(parentElement || document.body).getElementsByClassName(className);
  };
}(Element.Methods);

/*--------------------------------------------------------------------------*/

Element.ClassNames = Class.create();
Element.ClassNames.prototype = {
  initialize: function(element) {
    this.element = $(element);
  },

  _each: function(iterator) {
    this.element.className.split(/\s+/).select(function(name) {
      return name.length > 0;
    })._each(iterator);
  },

  set: function(className) {
    this.element.className = className;
  },

  add: function(classNameToAdd) {
    if (this.include(classNameToAdd)) return;
    this.set($A(this).concat(classNameToAdd).join(' '));
  },

  remove: function(classNameToRemove) {
    if (!this.include(classNameToRemove)) return;
    this.set($A(this).without(classNameToRemove).join(' '));
  },

  toString: function() {
    return $A(this).join(' ');
  }
};

Object.extend(Element.ClassNames.prototype, Enumerable);

/*--------------------------------------------------------------------------*/

Element.addMethods();
























var AjaxPrototype = {
  getTransport: function() {
    return Try.these(
      function() {return new XMLHttpRequest()},
      function() {return new ActiveXObject('Msxml2.XMLHTTP')},
      function() {return new ActiveXObject('Microsoft.XMLHTTP')}
    ) || false;
  },

  activeRequestCount: 0
};

AjaxPrototype.Responders = {
  responders: [],

  _each: function(iterator) {
    this.responders._each(iterator);
  },

  register: function(responder) {
    if (!this.include(responder))
      this.responders.push(responder);
  },

  unregister: function(responder) {
    this.responders = this.responders.without(responder);
  },

  dispatch: function(callback, request, transport, json) {
    this.each(function(responder) {
      if (Object.isFunction(responder[callback])) {
        try {
          responder[callback].apply(responder, [request, transport, json]);
        } catch (e) { }
      }
    });
  }
};

Object.extend(AjaxPrototype.Responders, Enumerable);

AjaxPrototype.Responders.register({
  onCreate:   function() { AjaxPrototype.activeRequestCount++ },
  onComplete: function() { AjaxPrototype.activeRequestCount-- }
});

AjaxPrototype.Base = Class.create({
  initialize: function(options) {
    this.options = {
      method:       'post',
      asynchronous: true,
      contentType:  'application/x-www-form-urlencoded',
      encoding:     'UTF-8',
      parameters:   '',
      evalJSON:     true,
      evalJS:       true
    };
    Object.extend(this.options, options || { });

    this.options.method = this.options.method.toLowerCase();
    if (Object.isString(this.options.parameters))
      this.options.parameters = this.options.parameters.toQueryParams();
  }
});

AjaxPrototype.Request = Class.create(AjaxPrototype.Base, {
  _complete: false,

  initialize: function($super, url, options) {
    $super(options);
    this.transport = AjaxPrototype.getTransport();
    this.request(url);
  },

  request: function(url) {
    this.url = url;
    this.method = this.options.method;
    var params = Object.clone(this.options.parameters);

    if (!['get', 'post'].include(this.method)) {
      // simulate other verbs over post
      params['_method'] = this.method;
      this.method = 'post';
    }

    this.parameters = params;

    if (params = Object.toQueryString(params)) {
      // when GET, append parameters to URL
      if (this.method == 'get')
        this.url += (this.url.include('?') ? '&' : '?') + params;
      else if (/Konqueror|Safari|KHTML/.test(navigator.userAgent))
        params += '&_=';
    }

    try {
      var response = new AjaxPrototype.Response(this);
      if (this.options.onCreate) this.options.onCreate(response);
      AjaxPrototype.Responders.dispatch('onCreate', this, response);

      this.transport.open(this.method.toUpperCase(), this.url,
        this.options.asynchronous);

      if (this.options.asynchronous) this.respondToReadyState.bind(this).defer(1);

      this.transport.onreadystatechange = this.onStateChange.bind(this);
      this.setRequestHeaders();

      this.body = this.method == 'post' ? (this.options.postBody || params) : null;
      this.transport.send(this.body);

      /* Force Firefox to handle ready state 4 for synchronous requests */
      if (!this.options.asynchronous && this.transport.overrideMimeType)
        this.onStateChange();

    }
    catch (e) {
      this.dispatchException(e);
    }
  },

  onStateChange: function() {
    var readyState = this.transport.readyState;
    if (readyState > 1 && !((readyState == 4) && this._complete))
      this.respondToReadyState(this.transport.readyState);
  },

  setRequestHeaders: function() {
    var headers = {
      'X-Requested-With': 'XMLHttpRequest',
      'X-Prototype-Version': Prototype.Version,
      'Accept': 'text/javascript, text/html, application/xml, text/xml, */*'
    };

    if (this.method == 'post') {
      headers['Content-type'] = this.options.contentType +
        (this.options.encoding ? '; charset=' + this.options.encoding : '');

      /* Force "Connection: close" for older Mozilla browsers to work
       * around a bug where XMLHttpRequest sends an incorrect
       * Content-length header. See Mozilla Bugzilla #246651.
       */
      if (this.transport.overrideMimeType &&
          (navigator.userAgent.match(/Gecko\/(\d{4})/) || [0,2005])[1] < 2005)
            headers['Connection'] = 'close';
    }

    // user-defined headers
    if (typeof this.options.requestHeaders == 'object') {
      var extras = this.options.requestHeaders;

      if (Object.isFunction(extras.push))
        for (var i = 0, length = extras.length; i < length; i += 2)
          headers[extras[i]] = extras[i+1];
      else
        $H(extras).each(function(pair) { headers[pair.key] = pair.value });
    }

    for (var name in headers)
      this.transport.setRequestHeader(name, headers[name]);
  },

  success: function() {
    var status = this.getStatus();
    return !status || (status >= 200 && status < 300);
  },

  getStatus: function() {
    try {
      return this.transport.status || 0;
    } catch (e) { return 0 }
  },

  respondToReadyState: function(readyState) {
    var state = AjaxPrototype.Request.Events[readyState], response = new AjaxPrototype.Response(this);

    if (state == 'Complete') {
      try {
        this._complete = true;
        (this.options['on' + response.status]
         || this.options['on' + (this.success() ? 'Success' : 'Failure')]
         || Prototype.emptyFunction)(response, response.headerJSON);
      } catch (e) {
        this.dispatchException(e);
      }

      var contentType = response.getHeader('Content-type');
      if (this.options.evalJS == 'force'
          || (this.options.evalJS && contentType
          && contentType.match(/^\s*(text|application)\/(x-)?(java|ecma)script(;.*)?\s*$/i)))
        this.evalResponse();
    }

    try {
      (this.options['on' + state] || Prototype.emptyFunction)(response, response.headerJSON);
      AjaxPrototype.Responders.dispatch('on' + state, this, response, response.headerJSON);
    } catch (e) {
      this.dispatchException(e);
    }

    if (state == 'Complete') {
      // avoid memory leak in MSIE: clean up
      this.transport.onreadystatechange = Prototype.emptyFunction;
    }
  },

  getHeader: function(name) {
    try {
      return this.transport.getResponseHeader(name);
    } catch (e) { return null }
  },

  evalResponse: function() {
    try {
      return eval((this.transport.responseText || '').unfilterJSON());
    } catch (e) {
      this.dispatchException(e);
    }
  },

  dispatchException: function(exception) {
    (this.options.onException || Prototype.emptyFunction)(this, exception);
    AjaxPrototype.Responders.dispatch('onException', this, exception);
  }
});

AjaxPrototype.Request.Events =
  ['Uninitialized', 'Loading', 'Loaded', 'Interactive', 'Complete'];

AjaxPrototype.Response = Class.create({
  initialize: function(request){
    this.request = request;
    var transport  = this.transport  = request.transport,
        readyState = this.readyState = transport.readyState;

    if((readyState > 2 && !Prototype.Browser.IE) || readyState == 4) {
      this.status       = this.getStatus();
      this.statusText   = this.getStatusText();
      this.responseText = String.interpret(transport.responseText);
      this.headerJSON   = this._getHeaderJSON();
    }

    if(readyState == 4) {
      var xml = transport.responseXML;
      this.responseXML  = xml === undefined ? null : xml;
      this.responseJSON = this._getResponseJSON();
    }
  },

  status:      0,
  statusText: '',

  getStatus: AjaxPrototype.Request.prototype.getStatus,

  getStatusText: function() {
    try {
      return this.transport.statusText || '';
    } catch (e) { return '' }
  },

  getHeader: AjaxPrototype.Request.prototype.getHeader,

  getAllHeaders: function() {
    try {
      return this.getAllResponseHeaders();
    } catch (e) { return null }
  },

  getResponseHeader: function(name) {
    return this.transport.getResponseHeader(name);
  },

  getAllResponseHeaders: function() {
    return this.transport.getAllResponseHeaders();
  },

  _getHeaderJSON: function() {
    var json = this.getHeader('X-JSON');
    if (!json) return null;
    json = decodeURIComponent(escape(json));
    try {
      return json.evalJSON(this.request.options.sanitizeJSON);
    } catch (e) {
      this.request.dispatchException(e);
    }
  },

  _getResponseJSON: function() {
    var options = this.request.options;
    if (!options.evalJSON || (options.evalJSON != 'force' &&
      !(this.getHeader('Content-type') || '').include('application/json')))
        return null;
    try {
      return this.transport.responseText.evalJSON(options.sanitizeJSON);
    } catch (e) {
      this.request.dispatchException(e);
    }
  }
});

AjaxPrototype.Updater = Class.create(AjaxPrototype.Request, {
  initialize: function($super, container, url, options) {
    this.container = {
      success: (container.success || container),
      failure: (container.failure || (container.success ? null : container))
    };

    options = options || { };
    var onComplete = options.onComplete;
    options.onComplete = (function(response, param) {
      this.updateContent(response.responseText);
      if (Object.isFunction(onComplete)) onComplete(response, param);
    }).bind(this);

    $super(url, options);
  },

  updateContent: function(responseText) {
    var receiver = this.container[this.success() ? 'success' : 'failure'],
        options = this.options;

    if (!options.evalScripts) responseText = responseText.stripScripts();

    if (receiver = $(receiver)) {
      if (options.insertion) {
        if (Object.isString(options.insertion)) {
          var insertion = { }; insertion[options.insertion] = responseText;
          receiver.insert(insertion);
        }
        else options.insertion(receiver, responseText);
      }
      else receiver.update(responseText);
    }

    if (this.success()) {
      if (this.onComplete) this.onComplete.bind(this).defer();
    }
  }
});

AjaxPrototype.PeriodicalUpdater = Class.create(AjaxPrototype.Base, {
  initialize: function($super, container, url, options) {
    $super(options);
    this.onComplete = this.options.onComplete;

    this.frequency = (this.options.frequency || 2);
    this.decay = (this.options.decay || 1);

    this.updater = { };
    this.container = container;
    this.url = url;

    this.start();
  },

  start: function() {
    this.options.onComplete = this.updateComplete.bind(this);
    this.onTimerEvent();
  },

  stop: function() {
    this.updater.options.onComplete = undefined;
    clearTimeout(this.timer);
    (this.onComplete || Prototype.emptyFunction).apply(this, arguments);
  },

  updateComplete: function(response) {
    if (this.options.decay) {
      this.decay = (response.responseText == this.lastText ?
        this.decay * this.options.decay : 1);

      this.lastText = response.responseText;
    }
    this.timer = this.onTimerEvent.bind(this).delay(this.decay * this.frequency);
  },

  onTimerEvent: function() {
    this.updater = new AjaxPrototype.Updater(this.container, this.url, this.options);
  }
});

// script.aculo.us scriptaculous.js v1.8.1, Thu Jan 03 22:07:12 -0500 2008

// Copyright (c) 2005-2007 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
// 
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// For details, see the script.aculo.us web site: http://script.aculo.us/

var Scriptaculous = {
  Version: '1.8.1',
  require: function(libraryName) {
    // inserting via DOM fails in Safari 2.0, so brute force approach
    document.write('<script type="text/javascript" src="'+libraryName+'"><\/script>');
  },
  REQUIRED_PROTOTYPE: '1.6.0',
  load: function() {
    function convertVersionString(versionString){
      var r = versionString.split('.');
      return parseInt(r[0])*100000 + parseInt(r[1])*1000 + parseInt(r[2]);
    }
 
    if((typeof Prototype=='undefined') || 
       (typeof Element == 'undefined') || 
       (typeof Element.Methods=='undefined') ||
       (convertVersionString(Prototype.Version) < 
        convertVersionString(Scriptaculous.REQUIRED_PROTOTYPE)))
       throw("script.aculo.us requires the Prototype JavaScript framework >= " +
        Scriptaculous.REQUIRED_PROTOTYPE);
    
    $A(document.getElementsByTagName("script")).findAll( function(s) {
      return (s.src && s.src.match(/scriptaculous\.js(\?.*)?$/))
    }).each( function(s) {
      var path = s.src.replace(/scriptaculous\.js(\?.*)?$/,'');
      var includes = s.src.match(/\?.*load=([a-z,]*)/);
      (includes ? includes[1] : 'builder,effects,dragdrop,controls,slider,sound').split(',').each(
       function(include) { Scriptaculous.require(path+include+'.js') });
    });
  }
}

Scriptaculous.load();

// script.aculo.us effects.js v1.8.1, Thu Jan 03 22:07:12 -0500 2008

// Copyright (c) 2005-2007 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
// Contributors:
//  Justin Palmer (http://encytemedia.com/)
//  Mark Pilgrim (http://diveintomark.org/)
//  Martin Bialasinki
// 
// script.aculo.us is freely distributable under the terms of an MIT-style license.
// For details, see the script.aculo.us web site: http://script.aculo.us/ 

// converts rgb() and #xxx to #xxxxxx format,  
// returns self (or first argument) if not convertable  
String.prototype.parseColor = function() {  
  var color = '#';
  if (this.slice(0,4) == 'rgb(') {  
    var cols = this.slice(4,this.length-1).split(',');  
    var i=0; do { color += parseInt(cols[i]).toColorPart() } while (++i<3);  
  } else {  
    if (this.slice(0,1) == '#') {  
      if (this.length==4) for(var i=1;i<4;i++) color += (this.charAt(i) + this.charAt(i)).toLowerCase();  
      if (this.length==7) color = this.toLowerCase();  
    }  
  }  
  return (color.length==7 ? color : (arguments[0] || this));  
};

/*--------------------------------------------------------------------------*/

Element.collectTextNodes = function(element) {  
  return $A($(element).childNodes).collect( function(node) {
    return (node.nodeType==3 ? node.nodeValue : 
      (node.hasChildNodes() ? Element.collectTextNodes(node) : ''));
  }).flatten().join('');
};

Element.collectTextNodesIgnoreClass = function(element, className) {  
  return $A($(element).childNodes).collect( function(node) {
    return (node.nodeType==3 ? node.nodeValue : 
      ((node.hasChildNodes() && !Element.hasClassName(node,className)) ? 
        Element.collectTextNodesIgnoreClass(node, className) : ''));
  }).flatten().join('');
};

Element.setContentZoom = function(element, percent) {
  element = $(element);  
  element.setStyle({fontSize: (percent/100) + 'em'});   
  if (Prototype.Browser.WebKit) window.scrollBy(0,0);
  return element;
};

Element.getInlineOpacity = function(element){
  return $(element).style.opacity || '';
};

Element.forceRerendering = function(element) {
  try {
    element = $(element);
    var n = document.createTextNode(' ');
    element.appendChild(n);
    element.removeChild(n);
  } catch(e) { }
};

/*--------------------------------------------------------------------------*/

var Effect = {
  _elementDoesNotExistError: {
    name: 'ElementDoesNotExistError',
    message: 'The specified DOM element does not exist, but is required for this effect to operate'
  },
  Transitions: {
    linear: Prototype.K,
    sinoidal: function(pos) {
      return (-Math.cos(pos*Math.PI)/2) + 0.5;
    },
    reverse: function(pos) {
      return 1-pos;
    },
    flicker: function(pos) {
      var pos = ((-Math.cos(pos*Math.PI)/4) + 0.75) + Math.random()/4;
      return pos > 1 ? 1 : pos;
    },
    wobble: function(pos) {
      return (-Math.cos(pos*Math.PI*(9*pos))/2) + 0.5;
    },
    pulse: function(pos, pulses) { 
      pulses = pulses || 5; 
      return (
        ((pos % (1/pulses)) * pulses).round() == 0 ? 
              ((pos * pulses * 2) - (pos * pulses * 2).floor()) : 
          1 - ((pos * pulses * 2) - (pos * pulses * 2).floor())
        );
    },
    spring: function(pos) { 
      return 1 - (Math.cos(pos * 4.5 * Math.PI) * Math.exp(-pos * 6)); 
    },
    none: function(pos) {
      return 0;
    },
    full: function(pos) {
      return 1;
    }
  },
  DefaultOptions: {
    duration:   1.0,   // seconds
    fps:        100,   // 100= assume 66fps max.
    sync:       false, // true for combining
    from:       0.0,
    to:         1.0,
    delay:      0.0,
    queue:      'parallel'
  },
  tagifyText: function(element) {
    var tagifyStyle = 'position:relative';
    if (Prototype.Browser.IE) tagifyStyle += ';zoom:1';
    
    element = $(element);
    $A(element.childNodes).each( function(child) {
      if (child.nodeType==3) {
        child.nodeValue.toArray().each( function(character) {
          element.insertBefore(
            new Element('span', {style: tagifyStyle}).update(
              character == ' ' ? String.fromCharCode(160) : character), 
              child);
        });
        Element.remove(child);
      }
    });
  },
  multiple: function(element, effect) {
    var elements;
    if (((typeof element == 'object') || 
        Object.isFunction(element)) && 
       (element.length))
      elements = element;
    else
      elements = $(element).childNodes;
      
    var options = Object.extend({
      speed: 0.1,
      delay: 0.0
    }, arguments[2] || { });
    var masterDelay = options.delay;

    $A(elements).each( function(element, index) {
      new effect(element, Object.extend(options, { delay: index * options.speed + masterDelay }));
    });
  },
  PAIRS: {
    'slide':  ['SlideDown','SlideUp'],
    'blind':  ['BlindDown','BlindUp'],
    'appear': ['Appear','Fade']
  },
  toggle: function(element, effect) {
    element = $(element);
    effect = (effect || 'appear').toLowerCase();
    var options = Object.extend({
      queue: { position:'end', scope:(element.id || 'global'), limit: 1 }
    }, arguments[2] || { });
    Effect[element.visible() ? 
      Effect.PAIRS[effect][1] : Effect.PAIRS[effect][0]](element, options);
  }
};

Effect.DefaultOptions.transition = Effect.Transitions.sinoidal;

/* ------------- core effects ------------- */

Effect.ScopedQueue = Class.create(Enumerable, {
  initialize: function() {
    this.effects  = [];
    this.interval = null;    
  },
  _each: function(iterator) {
    this.effects._each(iterator);
  },
  add: function(effect) {
    var timestamp = new Date().getTime();
    
    var position = Object.isString(effect.options.queue) ? 
      effect.options.queue : effect.options.queue.position;
    
    switch(position) {
      case 'front':
        // move unstarted effects after this effect  
        this.effects.findAll(function(e){ return e.state=='idle' }).each( function(e) {
            e.startOn  += effect.finishOn;
            e.finishOn += effect.finishOn;
          });
        break;
      case 'with-last':
        timestamp = this.effects.pluck('startOn').max() || timestamp;
        break;
      case 'end':
        // start effect after last queued effect has finished
        timestamp = this.effects.pluck('finishOn').max() || timestamp;
        break;
    }
    
    effect.startOn  += timestamp;
    effect.finishOn += timestamp;

    if (!effect.options.queue.limit || (this.effects.length < effect.options.queue.limit))
      this.effects.push(effect);
    
    if (!this.interval)
      this.interval = setInterval(this.loop.bind(this), 15);
  },
  remove: function(effect) {
    this.effects = this.effects.reject(function(e) { return e==effect });
    if (this.effects.length == 0) {
      clearInterval(this.interval);
      this.interval = null;
    }
  },
  loop: function() {
    var timePos = new Date().getTime();
    for(var i=0, len=this.effects.length;i<len;i++) 
      this.effects[i] && this.effects[i].loop(timePos);
  }
});

Effect.Queues = {
  instances: $H(),
  get: function(queueName) {
    if (!Object.isString(queueName)) return queueName;
    
    return this.instances.get(queueName) ||
      this.instances.set(queueName, new Effect.ScopedQueue());
  }
};
Effect.Queue = Effect.Queues.get('global');

Effect.Base = Class.create({
  position: null,
  start: function(options) {
    function codeForEvent(options,eventName){
      return (
        (options[eventName+'Internal'] ? 'this.options.'+eventName+'Internal(this);' : '') +
        (options[eventName] ? 'this.options.'+eventName+'(this);' : '')
      );
    }
    if (options && options.transition === false) options.transition = Effect.Transitions.linear;
    this.options      = Object.extend(Object.extend({ },Effect.DefaultOptions), options || { });
    this.currentFrame = 0;
    this.state        = 'idle';
    this.startOn      = this.options.delay*1000;
    this.finishOn     = this.startOn+(this.options.duration*1000);
    this.fromToDelta  = this.options.to-this.options.from;
    this.totalTime    = this.finishOn-this.startOn;
    this.totalFrames  = this.options.fps*this.options.duration;
    
    eval('this.render = function(pos){ '+
      'if (this.state=="idle"){this.state="running";'+
      codeForEvent(this.options,'beforeSetup')+
      (this.setup ? 'this.setup();':'')+ 
      codeForEvent(this.options,'afterSetup')+
      '};if (this.state=="running"){'+
      'pos=this.options.transition(pos)*'+this.fromToDelta+'+'+this.options.from+';'+
      'this.position=pos;'+
      codeForEvent(this.options,'beforeUpdate')+
      (this.update ? 'this.update(pos);':'')+
      codeForEvent(this.options,'afterUpdate')+
      '}}');
    
    this.event('beforeStart');
    if (!this.options.sync)
      Effect.Queues.get(Object.isString(this.options.queue) ? 
        'global' : this.options.queue.scope).add(this);
  },
  loop: function(timePos) {
    if (timePos >= this.startOn) {
      if (timePos >= this.finishOn) {
        this.render(1.0);
        this.cancel();
        this.event('beforeFinish');
        if (this.finish) this.finish(); 
        this.event('afterFinish');
        return;  
      }
      var pos   = (timePos - this.startOn) / this.totalTime,
          frame = (pos * this.totalFrames).round();
      if (frame > this.currentFrame) {
        this.render(pos);
        this.currentFrame = frame;
      }
    }
  },
  cancel: function() {
    if (!this.options.sync)
      Effect.Queues.get(Object.isString(this.options.queue) ? 
        'global' : this.options.queue.scope).remove(this);
    this.state = 'finished';
  },
  event: function(eventName) {
    if (this.options[eventName + 'Internal']) this.options[eventName + 'Internal'](this);
    if (this.options[eventName]) this.options[eventName](this);
  },
  inspect: function() {
    var data = $H();
    for(property in this)
      if (!Object.isFunction(this[property])) data.set(property, this[property]);
    return '#<Effect:' + data.inspect() + ',options:' + $H(this.options).inspect() + '>';
  }
});

Effect.Parallel = Class.create(Effect.Base, {
  initialize: function(effects) {
    this.effects = effects || [];
    this.start(arguments[1]);
  },
  update: function(position) {
    this.effects.invoke('render', position);
  },
  finish: function(position) {
    this.effects.each( function(effect) {
      effect.render(1.0);
      effect.cancel();
      effect.event('beforeFinish');
      if (effect.finish) effect.finish(position);
      effect.event('afterFinish');
    });
  }
});

Effect.Tween = Class.create(Effect.Base, {
  initialize: function(object, from, to) {
    object = Object.isString(object) ? $(object) : object;
    var args = $A(arguments), method = args.last(), 
      options = args.length == 5 ? args[3] : null;
    this.method = Object.isFunction(method) ? method.bind(object) :
      Object.isFunction(object[method]) ? object[method].bind(object) : 
      function(value) { object[method] = value };
    this.start(Object.extend({ from: from, to: to }, options || { }));
  },
  update: function(position) {
    this.method(position);
  }
});

Effect.Event = Class.create(Effect.Base, {
  initialize: function() {
    this.start(Object.extend({ duration: 0 }, arguments[0] || { }));
  },
  update: Prototype.emptyFunction
});

Effect.Opacity = Class.create(Effect.Base, {
  initialize: function(element) {
    this.element = $(element);
    if (!this.element) throw(Effect._elementDoesNotExistError);
    // make this work on IE on elements without 'layout'
    if (Prototype.Browser.IE && (!this.element.currentStyle.hasLayout))
      this.element.setStyle({zoom: 1});
    var options = Object.extend({
      from: this.element.getOpacity() || 0.0,
      to:   1.0
    }, arguments[1] || { });
    this.start(options);
  },
  update: function(position) {
    this.element.setOpacity(position);
  }
});

Effect.Move = Class.create(Effect.Base, {
  initialize: function(element) {
    this.element = $(element);
    if (!this.element) throw(Effect._elementDoesNotExistError);
    var options = Object.extend({
      x:    0,
      y:    0,
      mode: 'relative'
    }, arguments[1] || { });
    this.start(options);
  },
  setup: function() {
    this.element.makePositioned();
    this.originalLeft = parseFloat(this.element.getStyle('left') || '0');
    this.originalTop  = parseFloat(this.element.getStyle('top')  || '0');
    if (this.options.mode == 'absolute') {
      this.options.x = this.options.x - this.originalLeft;
      this.options.y = this.options.y - this.originalTop;
    }
  },
  update: function(position) {
    this.element.setStyle({
      left: (this.options.x  * position + this.originalLeft).round() + 'px',
      top:  (this.options.y  * position + this.originalTop).round()  + 'px'
    });
  }
});

// for backwards compatibility
Effect.MoveBy = function(element, toTop, toLeft) {
  return new Effect.Move(element, 
    Object.extend({ x: toLeft, y: toTop }, arguments[3] || { }));
};

Effect.Scale = Class.create(Effect.Base, {
  initialize: function(element, percent) {
    this.element = $(element);
    if (!this.element) throw(Effect._elementDoesNotExistError);
    var options = Object.extend({
      scaleX: true,
      scaleY: true,
      scaleContent: true,
      scaleFromCenter: false,
      scaleMode: 'box',        // 'box' or 'contents' or { } with provided values
      scaleFrom: 100.0,
      scaleTo:   percent
    }, arguments[2] || { });
    this.start(options);
  },
  setup: function() {
    this.restoreAfterFinish = this.options.restoreAfterFinish || false;
    this.elementPositioning = this.element.getStyle('position');
    
    this.originalStyle = { };
    ['top','left','width','height','fontSize'].each( function(k) {
      this.originalStyle[k] = this.element.style[k];
    }.bind(this));
      
    this.originalTop  = this.element.offsetTop;
    this.originalLeft = this.element.offsetLeft;
    
    var fontSize = this.element.getStyle('font-size') || '100%';
    ['em','px','%','pt'].each( function(fontSizeType) {
      if (fontSize.indexOf(fontSizeType)>0) {
        this.fontSize     = parseFloat(fontSize);
        this.fontSizeType = fontSizeType;
      }
    }.bind(this));
    
    this.factor = (this.options.scaleTo - this.options.scaleFrom)/100;
    
    this.dims = null;
    if (this.options.scaleMode=='box')
      this.dims = [this.element.offsetHeight, this.element.offsetWidth];
    if (/^content/.test(this.options.scaleMode))
      this.dims = [this.element.scrollHeight, this.element.scrollWidth];
    if (!this.dims)
      this.dims = [this.options.scaleMode.originalHeight,
                   this.options.scaleMode.originalWidth];
  },
  update: function(position) {
    var currentScale = (this.options.scaleFrom/100.0) + (this.factor * position);
    if (this.options.scaleContent && this.fontSize)
      this.element.setStyle({fontSize: this.fontSize * currentScale + this.fontSizeType });
    this.setDimensions(this.dims[0] * currentScale, this.dims[1] * currentScale);
  },
  finish: function(position) {
    if (this.restoreAfterFinish) this.element.setStyle(this.originalStyle);
  },
  setDimensions: function(height, width) {
    var d = { };
    if (this.options.scaleX) d.width = width.round() + 'px';
    if (this.options.scaleY) d.height = height.round() + 'px';
    if (this.options.scaleFromCenter) {
      var topd  = (height - this.dims[0])/2;
      var leftd = (width  - this.dims[1])/2;
      if (this.elementPositioning == 'absolute') {
        if (this.options.scaleY) d.top = this.originalTop-topd + 'px';
        if (this.options.scaleX) d.left = this.originalLeft-leftd + 'px';
      } else {
        if (this.options.scaleY) d.top = -topd + 'px';
        if (this.options.scaleX) d.left = -leftd + 'px';
      }
    }
    this.element.setStyle(d);
  }
});

Effect.Highlight = Class.create(Effect.Base, {
  initialize: function(element) {
    this.element = $(element);
    if (!this.element) throw(Effect._elementDoesNotExistError);
    var options = Object.extend({ startcolor: '#ffff99' }, arguments[1] || { });
    this.start(options);
  },
  setup: function() {
    // Prevent executing on elements not in the layout flow
    if (this.element.getStyle('display')=='none') { this.cancel(); return; }
    // Disable background image during the effect
    this.oldStyle = { };
    if (!this.options.keepBackgroundImage) {
      this.oldStyle.backgroundImage = this.element.getStyle('background-image');
      this.element.setStyle({backgroundImage: 'none'});
    }
    if (!this.options.endcolor)
      this.options.endcolor = this.element.getStyle('background-color').parseColor('#ffffff');
    if (!this.options.restorecolor)
      this.options.restorecolor = this.element.getStyle('background-color');
    // init color calculations
    this._base  = $R(0,2).map(function(i){ return parseInt(this.options.startcolor.slice(i*2+1,i*2+3),16) }.bind(this));
    this._delta = $R(0,2).map(function(i){ return parseInt(this.options.endcolor.slice(i*2+1,i*2+3),16)-this._base[i] }.bind(this));
  },
  update: function(position) {
    this.element.setStyle({backgroundColor: $R(0,2).inject('#',function(m,v,i){
      return m+((this._base[i]+(this._delta[i]*position)).round().toColorPart()); }.bind(this)) });
  },
  finish: function() {
    this.element.setStyle(Object.extend(this.oldStyle, {
      backgroundColor: this.options.restorecolor
    }));
  }
});

Effect.ScrollTo = function(element) {
  var options = arguments[1] || { },
    scrollOffsets = document.viewport.getScrollOffsets(),
    elementOffsets = $(element).cumulativeOffset(),
    max = (window.height || document.body.scrollHeight) - document.viewport.getHeight();  

  if (options.offset) elementOffsets[1] += options.offset;

  return new Effect.Tween(null,
    scrollOffsets.top,
    elementOffsets[1] > max ? max : elementOffsets[1],
    options,
    function(p){ scrollTo(scrollOffsets.left, p.round()) }
  );
};

/* ------------- combination effects ------------- */

Effect.Fade = function(element) {
  element = $(element);
  var oldOpacity = element.getInlineOpacity();
  var options = Object.extend({
    from: element.getOpacity() || 1.0,
    to:   0.0,
    afterFinishInternal: function(effect) { 
      if (effect.options.to!=0) return;
      effect.element.hide().setStyle({opacity: oldOpacity}); 
    }
  }, arguments[1] || { });
  return new Effect.Opacity(element,options);
};

Effect.Appear = function(element) {
  element = $(element);
  var options = Object.extend({
  from: (element.getStyle('display') == 'none' ? 0.0 : element.getOpacity() || 0.0),
  to:   1.0,
  // force Safari to render floated elements properly
  afterFinishInternal: function(effect) {
    effect.element.forceRerendering();
  },
  beforeSetup: function(effect) {
    effect.element.setOpacity(effect.options.from).show(); 
  }}, arguments[1] || { });
  return new Effect.Opacity(element,options);
};

Effect.Puff = function(element) {
  element = $(element);
  var oldStyle = { 
    opacity: element.getInlineOpacity(), 
    position: element.getStyle('position'),
    top:  element.style.top,
    left: element.style.left,
    width: element.style.width,
    height: element.style.height
  };
  return new Effect.Parallel(
   [ new Effect.Scale(element, 200, 
      { sync: true, scaleFromCenter: true, scaleContent: true, restoreAfterFinish: true }), 
     new Effect.Opacity(element, { sync: true, to: 0.0 } ) ], 
     Object.extend({ duration: 1.0, 
      beforeSetupInternal: function(effect) {
        Position.absolutize(effect.effects[0].element)
      },
      afterFinishInternal: function(effect) {
         effect.effects[0].element.hide().setStyle(oldStyle); }
     }, arguments[1] || { })
   );
};

Effect.BlindUp = function(element) {
  element = $(element);
  element.makeClipping();
  return new Effect.Scale(element, 0,
    Object.extend({ scaleContent: false, 
      scaleX: false, 
      restoreAfterFinish: true,
      afterFinishInternal: function(effect) {
        effect.element.hide().undoClipping();
      } 
    }, arguments[1] || { })
  );
};

Effect.BlindDown = function(element) {
  element = $(element);
  var elementDimensions = element.getDimensions();
  return new Effect.Scale(element, 100, Object.extend({ 
    scaleContent: false, 
    scaleX: false,
    scaleFrom: 0,
    scaleMode: {originalHeight: elementDimensions.height, originalWidth: elementDimensions.width},
    restoreAfterFinish: true,
    afterSetup: function(effect) {
      effect.element.makeClipping().setStyle({height: '0px'}).show(); 
    },  
    afterFinishInternal: function(effect) {
      effect.element.undoClipping();
    }
  }, arguments[1] || { }));
};

Effect.SwitchOff = function(element) {
  element = $(element);
  var oldOpacity = element.getInlineOpacity();
  return new Effect.Appear(element, Object.extend({
    duration: 0.4,
    from: 0,
    transition: Effect.Transitions.flicker,
    afterFinishInternal: function(effect) {
      new Effect.Scale(effect.element, 1, { 
        duration: 0.3, scaleFromCenter: true,
        scaleX: false, scaleContent: false, restoreAfterFinish: true,
        beforeSetup: function(effect) { 
          effect.element.makePositioned().makeClipping();
        },
        afterFinishInternal: function(effect) {
          effect.element.hide().undoClipping().undoPositioned().setStyle({opacity: oldOpacity});
        }
      })
    }
  }, arguments[1] || { }));
};

Effect.DropOut = function(element) {
  element = $(element);
  var oldStyle = {
    top: element.getStyle('top'),
    left: element.getStyle('left'),
    opacity: element.getInlineOpacity() };
  return new Effect.Parallel(
    [ new Effect.Move(element, {x: 0, y: 100, sync: true }), 
      new Effect.Opacity(element, { sync: true, to: 0.0 }) ],
    Object.extend(
      { duration: 0.5,
        beforeSetup: function(effect) {
          effect.effects[0].element.makePositioned(); 
        },
        afterFinishInternal: function(effect) {
          effect.effects[0].element.hide().undoPositioned().setStyle(oldStyle);
        } 
      }, arguments[1] || { }));
};

Effect.Shake = function(element) {
  element = $(element);
  var options = Object.extend({
    distance: 20,
    duration: 0.5
  }, arguments[1] || {});
  var distance = parseFloat(options.distance);
  var split = parseFloat(options.duration) / 10.0;
  var oldStyle = {
    top: element.getStyle('top'),
    left: element.getStyle('left') };
    return new Effect.Move(element,
      { x:  distance, y: 0, duration: split, afterFinishInternal: function(effect) {
    new Effect.Move(effect.element,
      { x: -distance*2, y: 0, duration: split*2,  afterFinishInternal: function(effect) {
    new Effect.Move(effect.element,
      { x:  distance*2, y: 0, duration: split*2,  afterFinishInternal: function(effect) {
    new Effect.Move(effect.element,
      { x: -distance*2, y: 0, duration: split*2,  afterFinishInternal: function(effect) {
    new Effect.Move(effect.element,
      { x:  distance*2, y: 0, duration: split*2,  afterFinishInternal: function(effect) {
    new Effect.Move(effect.element,
      { x: -distance, y: 0, duration: split, afterFinishInternal: function(effect) {
        effect.element.undoPositioned().setStyle(oldStyle);
  }}) }}) }}) }}) }}) }});
};

Effect.SlideDown = function(element) {
  element = $(element).cleanWhitespace();
  // SlideDown need to have the content of the element wrapped in a container element with fixed height!
  var oldInnerBottom = element.down().getStyle('bottom');
  var elementDimensions = element.getDimensions();
  return new Effect.Scale(element, 100, Object.extend({ 
    scaleContent: false, 
    scaleX: false, 
    scaleFrom: window.opera ? 0 : 1,
    scaleMode: {originalHeight: elementDimensions.height, originalWidth: elementDimensions.width},
    restoreAfterFinish: true,
    afterSetup: function(effect) {
      effect.element.makePositioned();
      effect.element.down().makePositioned();
      if (window.opera) effect.element.setStyle({top: ''});
      effect.element.makeClipping().setStyle({height: '0px'}).show(); 
    },
    afterUpdateInternal: function(effect) {
      effect.element.down().setStyle({bottom:
        (effect.dims[0] - effect.element.clientHeight) + 'px' }); 
    },
    afterFinishInternal: function(effect) {
      effect.element.undoClipping().undoPositioned();
      effect.element.down().undoPositioned().setStyle({bottom: oldInnerBottom}); }
    }, arguments[1] || { })
  );
};

Effect.SlideUp = function(element) {
  element = $(element).cleanWhitespace();
  var oldInnerBottom = element.down().getStyle('bottom');
  var elementDimensions = element.getDimensions();
  return new Effect.Scale(element, window.opera ? 0 : 1,
   Object.extend({ scaleContent: false, 
    scaleX: false, 
    scaleMode: 'box',
    scaleFrom: 100,
    scaleMode: {originalHeight: elementDimensions.height, originalWidth: elementDimensions.width},
    restoreAfterFinish: true,
    afterSetup: function(effect) {
      effect.element.makePositioned();
      effect.element.down().makePositioned();
      if (window.opera) effect.element.setStyle({top: ''});
      effect.element.makeClipping().show();
    },  
    afterUpdateInternal: function(effect) {
      effect.element.down().setStyle({bottom:
        (effect.dims[0] - effect.element.clientHeight) + 'px' });
    },
    afterFinishInternal: function(effect) {
      effect.element.hide().undoClipping().undoPositioned();
      effect.element.down().undoPositioned().setStyle({bottom: oldInnerBottom});
    }
   }, arguments[1] || { })
  );
};

// Bug in opera makes the TD containing this element expand for a instance after finish 
Effect.Squish = function(element) {
  return new Effect.Scale(element, window.opera ? 1 : 0, { 
    restoreAfterFinish: true,
    beforeSetup: function(effect) {
      effect.element.makeClipping(); 
    },  
    afterFinishInternal: function(effect) {
      effect.element.hide().undoClipping(); 
    }
  });
};

Effect.Grow = function(element) {
  element = $(element);
  var options = Object.extend({
    direction: 'center',
    moveTransition: Effect.Transitions.sinoidal,
    scaleTransition: Effect.Transitions.sinoidal,
    opacityTransition: Effect.Transitions.full
  }, arguments[1] || { });
  var oldStyle = {
    top: element.style.top,
    left: element.style.left,
    height: element.style.height,
    width: element.style.width,
    opacity: element.getInlineOpacity() };

  var dims = element.getDimensions();    
  var initialMoveX, initialMoveY;
  var moveX, moveY;
  
  switch (options.direction) {
    case 'top-left':
      initialMoveX = initialMoveY = moveX = moveY = 0; 
      break;
    case 'top-right':
      initialMoveX = dims.width;
      initialMoveY = moveY = 0;
      moveX = -dims.width;
      break;
    case 'bottom-left':
      initialMoveX = moveX = 0;
      initialMoveY = dims.height;
      moveY = -dims.height;
      break;
    case 'bottom-right':
      initialMoveX = dims.width;
      initialMoveY = dims.height;
      moveX = -dims.width;
      moveY = -dims.height;
      break;
    case 'center':
      initialMoveX = dims.width / 2;
      initialMoveY = dims.height / 2;
      moveX = -dims.width / 2;
      moveY = -dims.height / 2;
      break;
  }
  
  return new Effect.Move(element, {
    x: initialMoveX,
    y: initialMoveY,
    duration: 0.01, 
    beforeSetup: function(effect) {
      effect.element.hide().makeClipping().makePositioned();
    },
    afterFinishInternal: function(effect) {
      new Effect.Parallel(
        [ new Effect.Opacity(effect.element, { sync: true, to: 1.0, from: 0.0, transition: options.opacityTransition }),
          new Effect.Move(effect.element, { x: moveX, y: moveY, sync: true, transition: options.moveTransition }),
          new Effect.Scale(effect.element, 100, {
            scaleMode: { originalHeight: dims.height, originalWidth: dims.width }, 
            sync: true, scaleFrom: window.opera ? 1 : 0, transition: options.scaleTransition, restoreAfterFinish: true})
        ], Object.extend({
             beforeSetup: function(effect) {
               effect.effects[0].element.setStyle({height: '0px'}).show(); 
             },
             afterFinishInternal: function(effect) {
               effect.effects[0].element.undoClipping().undoPositioned().setStyle(oldStyle); 
             }
           }, options)
      )
    }
  });
};

Effect.Shrink = function(element) {
  element = $(element);
  var options = Object.extend({
    direction: 'center',
    moveTransition: Effect.Transitions.sinoidal,
    scaleTransition: Effect.Transitions.sinoidal,
    opacityTransition: Effect.Transitions.none
  }, arguments[1] || { });
  var oldStyle = {
    top: element.style.top,
    left: element.style.left,
    height: element.style.height,
    width: element.style.width,
    opacity: element.getInlineOpacity() };

  var dims = element.getDimensions();
  var moveX, moveY;
  
  switch (options.direction) {
    case 'top-left':
      moveX = moveY = 0;
      break;
    case 'top-right':
      moveX = dims.width;
      moveY = 0;
      break;
    case 'bottom-left':
      moveX = 0;
      moveY = dims.height;
      break;
    case 'bottom-right':
      moveX = dims.width;
      moveY = dims.height;
      break;
    case 'center':  
      moveX = dims.width / 2;
      moveY = dims.height / 2;
      break;
  }
  
  return new Effect.Parallel(
    [ new Effect.Opacity(element, { sync: true, to: 0.0, from: 1.0, transition: options.opacityTransition }),
      new Effect.Scale(element, window.opera ? 1 : 0, { sync: true, transition: options.scaleTransition, restoreAfterFinish: true}),
      new Effect.Move(element, { x: moveX, y: moveY, sync: true, transition: options.moveTransition })
    ], Object.extend({            
         beforeStartInternal: function(effect) {
           effect.effects[0].element.makePositioned().makeClipping(); 
         },
         afterFinishInternal: function(effect) {
           effect.effects[0].element.hide().undoClipping().undoPositioned().setStyle(oldStyle); }
       }, options)
  );
};

Effect.Pulsate = function(element) {
  element = $(element);
  var options    = arguments[1] || { };
  var oldOpacity = element.getInlineOpacity();
  var transition = options.transition || Effect.Transitions.sinoidal;
  var reverser   = function(pos){ return transition(1-Effect.Transitions.pulse(pos, options.pulses)) };
  reverser.bind(transition);
  return new Effect.Opacity(element, 
    Object.extend(Object.extend({  duration: 2.0, from: 0,
      afterFinishInternal: function(effect) { effect.element.setStyle({opacity: oldOpacity}); }
    }, options), {transition: reverser}));
};

Effect.Fold = function(element) {
  element = $(element);
  var oldStyle = {
    top: element.style.top,
    left: element.style.left,
    width: element.style.width,
    height: element.style.height };
  element.makeClipping();
  return new Effect.Scale(element, 5, Object.extend({   
    scaleContent: false,
    scaleX: false,
    afterFinishInternal: function(effect) {
    new Effect.Scale(element, 1, { 
      scaleContent: false, 
      scaleY: false,
      afterFinishInternal: function(effect) {
        effect.element.hide().undoClipping().setStyle(oldStyle);
      } });
  }}, arguments[1] || { }));
};

Effect.Morph = Class.create(Effect.Base, {
  initialize: function(element) {
    this.element = $(element);
    if (!this.element) throw(Effect._elementDoesNotExistError);
    var options = Object.extend({
      style: { }
    }, arguments[1] || { });
    
    if (!Object.isString(options.style)) this.style = $H(options.style);
    else {
      if (options.style.include(':'))
        this.style = options.style.parseStyle();
      else {
        this.element.addClassName(options.style);
        this.style = $H(this.element.getStyles());
        this.element.removeClassName(options.style);
        var css = this.element.getStyles();
        this.style = this.style.reject(function(style) {
          return style.value == css[style.key];
        });
        options.afterFinishInternal = function(effect) {
          effect.element.addClassName(effect.options.style);
          effect.transforms.each(function(transform) {
            effect.element.style[transform.style] = '';
          });
        }
      }
    }
    this.start(options);
  },
  
  setup: function(){
    function parseColor(color){
      if (!color || ['rgba(0, 0, 0, 0)','transparent'].include(color)) color = '#ffffff';
      color = color.parseColor();
      return $R(0,2).map(function(i){
        return parseInt( color.slice(i*2+1,i*2+3), 16 ) 
      });
    }
    this.transforms = this.style.map(function(pair){
      var property = pair[0], value = pair[1], unit = null;

      if (value.parseColor('#zzzzzz') != '#zzzzzz') {
        value = value.parseColor();
        unit  = 'color';
      } else if (property == 'opacity') {
        value = parseFloat(value);
        if (Prototype.Browser.IE && (!this.element.currentStyle.hasLayout))
          this.element.setStyle({zoom: 1});
      } else if (Element.CSS_LENGTH.test(value)) {
          var components = value.match(/^([\+\-]?[0-9\.]+)(.*)$/);
          value = parseFloat(components[1]);
          unit = (components.length == 3) ? components[2] : null;
      }

      var originalValue = this.element.getStyle(property);
      return { 
        style: property.camelize(), 
        originalValue: unit=='color' ? parseColor(originalValue) : parseFloat(originalValue || 0), 
        targetValue: unit=='color' ? parseColor(value) : value,
        unit: unit
      };
    }.bind(this)).reject(function(transform){
      return (
        (transform.originalValue == transform.targetValue) ||
        (
          transform.unit != 'color' &&
          (isNaN(transform.originalValue) || isNaN(transform.targetValue))
        )
      )
    });
  },
  update: function(position) {
    var style = { }, transform, i = this.transforms.length;
    while(i--)
      style[(transform = this.transforms[i]).style] = 
        transform.unit=='color' ? '#'+
          (Math.round(transform.originalValue[0]+
            (transform.targetValue[0]-transform.originalValue[0])*position)).toColorPart() +
          (Math.round(transform.originalValue[1]+
            (transform.targetValue[1]-transform.originalValue[1])*position)).toColorPart() +
          (Math.round(transform.originalValue[2]+
            (transform.targetValue[2]-transform.originalValue[2])*position)).toColorPart() :
        (transform.originalValue +
          (transform.targetValue - transform.originalValue) * position).toFixed(3) + 
            (transform.unit === null ? '' : transform.unit);
    this.element.setStyle(style, true);
  }
});

Effect.Transform = Class.create({
  initialize: function(tracks){
    this.tracks  = [];
    this.options = arguments[1] || { };
    this.addTracks(tracks);
  },
  addTracks: function(tracks){
    tracks.each(function(track){
      track = $H(track);
      var data = track.values().first();
      this.tracks.push($H({
        ids:     track.keys().first(),
        effect:  Effect.Morph,
        options: { style: data }
      }));
    }.bind(this));
    return this;
  },
  play: function(){
    return new Effect.Parallel(
      this.tracks.map(function(track){
        var ids = track.get('ids'), effect = track.get('effect'), options = track.get('options');
        var elements = [$(ids) || $$(ids)].flatten();
        return elements.map(function(e){ return new effect(e, Object.extend({ sync:true }, options)) });
      }).flatten(),
      this.options
    );
  }
});

Element.CSS_PROPERTIES = $w(
  'backgroundColor backgroundPosition borderBottomColor borderBottomStyle ' + 
  'borderBottomWidth borderLeftColor borderLeftStyle borderLeftWidth ' +
  'borderRightColor borderRightStyle borderRightWidth borderSpacing ' +
  'borderTopColor borderTopStyle borderTopWidth bottom clip color ' +
  'fontSize fontWeight height left letterSpacing lineHeight ' +
  'marginBottom marginLeft marginRight marginTop markerOffset maxHeight '+
  'maxWidth minHeight minWidth opacity outlineColor outlineOffset ' +
  'outlineWidth paddingBottom paddingLeft paddingRight paddingTop ' +
  'right textIndent top width wordSpacing zIndex');
  
Element.CSS_LENGTH = /^(([\+\-]?[0-9\.]+)(em|ex|px|in|cm|mm|pt|pc|\%))|0$/;

String.__parseStyleElement = document.createElement('div');
String.prototype.parseStyle = function(){
  var style, styleRules = $H();
  if (Prototype.Browser.WebKit)
    style = new Element('div',{style:this}).style;
  else {
    String.__parseStyleElement.innerHTML = '<div style="' + this + '"></div>';
    style = String.__parseStyleElement.childNodes[0].style;
  }
  
  Element.CSS_PROPERTIES.each(function(property){
    if (style[property]) styleRules.set(property, style[property]); 
  });
  
  if (Prototype.Browser.IE && this.include('opacity'))
    styleRules.set('opacity', this.match(/opacity:\s*((?:0|1)?(?:\.\d*)?)/)[1]);

  return styleRules;
};

if (document.defaultView && document.defaultView.getComputedStyle) {
  Element.getStyles = function(element) {
    var css = document.defaultView.getComputedStyle($(element), null);
    return Element.CSS_PROPERTIES.inject({ }, function(styles, property) {
      styles[property] = css[property];
      return styles;
    });
  };
} else {
  Element.getStyles = function(element) {
    element = $(element);
    var css = element.currentStyle, styles;
    styles = Element.CSS_PROPERTIES.inject({ }, function(results, property) {
      results[property] = css[property];
      return results;
    });
    if (!styles.opacity) styles.opacity = element.getOpacity();
    return styles;
  };
};

Effect.Methods = {
  morph: function(element, style) {
    element = $(element);
    new Effect.Morph(element, Object.extend({ style: style }, arguments[2] || { }));
    return element;
  },
  visualEffect: function(element, effect, options) {
    element = $(element)
    var s = effect.dasherize().camelize(), klass = s.charAt(0).toUpperCase() + s.substring(1);
    new Effect[klass](element, options);
    return element;
  },
  highlight: function(element, options) {
    element = $(element);
    new Effect.Highlight(element, options);
    return element;
  }
};

$w('fade appear grow shrink fold blindUp blindDown slideUp slideDown '+
  'pulsate shake puff squish switchOff dropOut').each(
  function(effect) { 
    Effect.Methods[effect] = function(element, options){
      element = $(element);
      Effect[effect.charAt(0).toUpperCase() + effect.substring(1)](element, options);
      return element;
    }
  }
);

$w('getInlineOpacity forceRerendering setContentZoom collectTextNodes collectTextNodesIgnoreClass getStyles').each( 
  function(f) { Effect.Methods[f] = Element[f]; }
);

Element.addMethods(Effect.Methods);