var bustcachevar=1; //bust potential caching loading.gif'of external pages after initial request? (1=yes, 0=no)


var loadstatustext="<span style='position:relative; top:5px;'><img src='includes/ajaxtabs/loading.gif'/>"+


				"<span style='position:relative; top:-3px;'>&nbsp;Please wait...</span></span>";





////NO NEED TO EDIT BELOW////////////////////////


var loadedobjects="";


var defaultcontentarray=new Object();


var bustcacheparameter="";





function ajaxpage(url, containerid, targetobj) {


	var page_request = false;


	if (window.XMLHttpRequest) // if Mozilla, Safari etc


	page_request = new XMLHttpRequest();


	else if (window.ActiveXObject) { // if IE


		try {


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


		} 


		catch (e) {


			try {


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


			}


			catch (e) {}


		}


    } else {


		alert('Giving up :( Cannot create an XMLHTTP instance.\n'+


			'Your browser does not support XMLHTTP requests.\n'+


			'You may need to upgrade your browser.');


	 	return false;


    }


	var ullist=targetobj.parentNode.parentNode.getElementsByTagName("li");


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


		ullist[i].className="";  //deselect all tabs


	targetobj.parentNode.className="selected";  //highlight currently clicked on tab


	if (url.indexOf("#default")!=-1) { //if simply show default content within container (verus fetch it via ajax)


		document.getElementById(containerid).innerHTML=defaultcontentarray[containerid];


		return;


	}


	document.getElementById(containerid).innerHTML=loadstatustext


	page_request.onreadystatechange=function() { 


		loadpage(page_request, containerid)


	}





	if (bustcachevar) //if bust caching of external page


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


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


	page_request.send(null);


}





function loadpage(page_request, containerid) {


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


		document.getElementById(containerid).innerHTML=page_request.responseText;


}





function loadobjs(revattribute) {


	if (revattribute!=null && revattribute!="") { //if "rev" attribute is defined (load external .js or .css files)


		var objectlist=revattribute.split(/\s*,\s*/); //split the files and store as array


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


			var file=objectlist[i];


			var fileref="";


			if (loadedobjects.indexOf(file)==-1) { //Check to see if this object has not already been added to page before proceeding


				if (file.indexOf(".js")!=-1) { //If object is a js file


					fileref=document.createElement('script');


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


					fileref.setAttribute("src", file);


				} else if (file.indexOf(".css")!=-1) { //If object is a css file


					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);


				loadedobjects+=file+" "; //Remember this object as being already added to page


			}


		}


	}


}





function savedefaultcontent(contentid) {// save default ajax tab content


	if (typeof defaultcontentarray[contentid]=="undefined") //if default content hasn't already been saved


		defaultcontentarray[contentid]=document.getElementById(contentid).innerHTML;


}





function startajaxtabs() {


	for (var i=0; i<arguments.length; i++) { //loop through passed UL ids


		var ulobj=document.getElementById(arguments[i]);


		var ulist=ulobj.getElementsByTagName("li"); //array containing the LI elements within UL


		for (var x=0; x<ulist.length; x++) { //loop through each LI element


			var ulistlink=ulist[x].getElementsByTagName("a")[0];


			if (ulistlink.getAttribute("rel")) {


				var modifiedurl=ulistlink.getAttribute("href").replace(/^http:\/\/[^\/]+\//i, "http://"+window.location.hostname+"/");


				ulistlink.setAttribute("href", modifiedurl); //replace URL's root domain with dynamic root domain, for ajax security sake


				savedefaultcontent(ulistlink.getAttribute("rel")); //save default ajax tab content


				ulistlink.onclick=function() {


					ajaxpage(this.getAttribute("href"), this.getAttribute("rel"), this);


					loadobjs(this.getAttribute("rev"));


					return false;


				}


				if (ulist[x].className=="selected") {


					ajaxpage(ulistlink.getAttribute("href"), ulistlink.getAttribute("rel"), ulistlink); //auto load currenly selected tab content


					loadobjs(ulistlink.getAttribute("rev")); //auto load any accompanying .js and .css files


				}


			}


		}


	}


}