/*

* @version		$Id: slider.js 2008 vargas $ @package Joomla

*/

var fn_csbustcachevar=0;

var fn_enabletransition=1;

var fn_csloadstatustext="Loading...";

var fn_csexternalfiles=[];

var fn_enablepersist=true;

var fn_slidernodes=new Object();

var fn_csloadedobjects="";



function FN_ContentSlider(sliderid, autorun, customNextText){

	var slider=document.getElementById(sliderid);

	if (typeof customNextText!="undefined" && customNextText!="")

		slider.nextText=customNextText;

	fn_slidernodes[sliderid]=[];

	FN_ContentSlider.loadobjects(fn_csexternalfiles);

	var alldivs=slider.getElementsByTagName("div");

	for (var i=0; i<alldivs.length; i++){

		if (alldivs[i].className=="opacitylayer")

			slider.opacitylayer=alldivs[i];

		else if (alldivs[i].className=="fn_news"){

			fn_slidernodes[sliderid].push(alldivs[i]);

			if (typeof alldivs[i].getAttribute("rel")=="string")

				FN_ContentSlider.ajaxpage(alldivs[i].getAttribute("rel"), alldivs[i]);

		}

	}

	FN_ContentSlider.buildpagination(sliderid);

	var loadfirstcontent=true;

	if (fn_enablepersist && getCookie(sliderid)!=""){

		var cookieval=getCookie(sliderid).split(":"); 

		if (document.getElementById(cookieval[0])!=null && typeof fn_slidernodes[sliderid][cookieval[1]]!="undefined"){ 

			FN_ContentSlider.turnpage(cookieval[0], parseInt(cookieval[1]));

			loadfirstcontent=false;

		}

	}

	if (loadfirstcontent==true)

		FN_ContentSlider.turnpage(sliderid, 0);

	if (typeof autorun=="number" && autorun>0)

		window[sliderid+"timer"]=setTimeout(function(){FN_ContentSlider.autoturnpage(sliderid, autorun)}, autorun);

}



FN_ContentSlider.buildpagination=function(sliderid){

	var slider=document.getElementById(sliderid);

	var paginatediv=document.getElementById("paginate-"+sliderid);

	var pcontent="";

	for (var i=0; i<fn_slidernodes[sliderid].length; i++)

		pcontent+='<a href="#" onClick=\"FN_ContentSlider.turnpage(\''+sliderid+'\', '+i+'); return false\">'+(i+1)+'</a> ';

	pcontent+='<a href="#" style="font-weight: bold;" onClick=\"FN_ContentSlider.turnpage(\''+sliderid+'\', parseInt(this.getAttribute(\'rel\'))); return false\">'+(slider.nextText || "")+'</a>';

	paginatediv.innerHTML=pcontent;

	paginatediv.onclick=function(){

	if (typeof window[sliderid+"timer"]!="undefined")

		clearTimeout(window[sliderid+"timer"]);

	}

}



FN_ContentSlider.turnpage=function(sliderid, thepage){

	var paginatelinks=document.getElementById("paginate-"+sliderid).getElementsByTagName("a"); //gather pagination links

	for (var i=0; i<fn_slidernodes[sliderid].length; i++){

		paginatelinks[i].className="";

		fn_slidernodes[sliderid][i].style.display="none";

	}

	paginatelinks[thepage].className="selected";

	if (fn_enabletransition){

		if (window[sliderid+"fadetimer"])

			clearTimeout(window[sliderid+"fadetimer"]);

		this.setopacity(sliderid, 0.1);

	}

	fn_slidernodes[sliderid][thepage].style.display="block";

	if (fn_enabletransition)

		this.fadeup(sliderid, thepage);

	paginatelinks[paginatelinks.length-1].setAttribute("rel", thenextpage=(thepage<paginatelinks.length-2)? thepage+1 : 0);

	if (fn_enablepersist)

		setCookie(sliderid, sliderid+":"+thepage);

}



FN_ContentSlider.autoturnpage=function(sliderid, autorunperiod){

	var paginatelinks=document.getElementById("paginate-"+sliderid).getElementsByTagName("a"); 

	var nextpagenumber=parseInt(paginatelinks[paginatelinks.length-1].getAttribute("rel")); 

	FN_ContentSlider.turnpage(sliderid, nextpagenumber);

	window[sliderid+"timer"]=setTimeout(function(){FN_ContentSlider.autoturnpage(sliderid, autorunperiod)}, autorunperiod);

}



FN_ContentSlider.setopacity=function(sliderid, value){

	var targetobject=document.getElementById(sliderid).opacitylayer || null; 

	if (targetobject && targetobject.filters && targetobject.filters[0]){

		if (typeof targetobject.filters[0].opacity=="number")

			targetobject.filters[0].opacity=value*100;

		else

			targetobject.style.filter="alpha(opacity="+value*100+")";

		}

	else if (targetobject && typeof targetobject.style.MozOpacity!="undefined")

		targetobject.style.MozOpacity=value;

	else if (targetobject && typeof targetobject.style.opacity!="undefined")

		targetobject.style.opacity=value;

	targetobject.currentopacity=value;

}



FN_ContentSlider.fadeup=function(sliderid){

	var targetobject=document.getElementById(sliderid).opacitylayer || null;

	if (targetobject && targetobject.currentopacity<1){

		this.setopacity(sliderid, targetobject.currentopacity+0.1);

		window[sliderid+"fadetimer"]=setTimeout(function(){FN_ContentSlider.fadeup(sliderid)}, 100);

	}

}



function getCookie(Name){ 

	var re=new RegExp(Name+"=[^;]+", "i"); 

	if (document.cookie.match(re))

		return document.cookie.match(re)[0].split("=")[1];

	return "";

}



function setCookie(name, value){

	document.cookie = name+"="+value;

}



FN_ContentSlider.ajaxpage=function(url, thediv){

	var page_request = false;

	var bustcacheparameter="";

	if (window.XMLHttpRequest)

		page_request = new XMLHttpRequest();

	else if (window.ActiveXObject){

		try {

		page_request = new ActiveXObject("Msxml2.XMLHTTP");

		} 

		catch (e){

		try{

		page_request = new ActiveXObject("Microsoft.XMLHTTP");

		}

		catch (e){}

		}

	}

	else

		return false;

	thediv.innerHTML=fn_csloadstatustext;

	page_request.onreadystatechange=function(){

		FN_ContentSlider.loadpage(page_request, thediv);

	}

	if (fn_csbustcachevar)

		bustcacheparameter=(url.indexOf("?")!=-1)? "&"+new Date().getTime() : "?"+new Date().getTime();

	page_request.open('GET', url+bustcacheparameter, true);

	page_request.send(null);

}



FN_ContentSlider.loadpage=function(page_request, thediv){

	if (page_request.readyState == 4 && (page_request.status==200 || window.location.href.indexOf("http")==-1))

		thediv.innerHTML=page_request.responseText;

}



FN_ContentSlider.loadobjects=function(externalfiles){ 

	for (var i=0; i<externalfiles.length; i++){

		var file=externalfiles[i];

		var fileref="";

		if (fn_csloadedobjects.indexOf(file)==-1){ 

			if (file.indexOf(".js")!=-1){

				fileref=document.createElement('script');

				fileref.setAttribute("type","text/javascript");

				fileref.setAttribute("src", file);

			}

			else if (file.indexOf(".css")!=-1){

				fileref=document.createElement("link");

				fileref.setAttribute("rel", "stylesheet");

				fileref.setAttribute("type", "text/css");

				fileref.setAttribute("href", file);

			}

		}

		if (fileref!=""){

			document.getElementsByTagName("head").item(0).appendChild(fileref);

			fn_csloadedobjects+=file+" "; 

		}

	}

}