var bustcachevar=1 //bust potential caching of external pages after initial request? (1=yes, 0=no)
var loadstatustext="<img src='images/loading_announcement.gif' />"
////NO NEED TO EDIT BELOW////////////////////////
var loadedobjects=""
var defaultcontentarray=new Object()
var bustcacheparameter=""

function ajaxpage(url, containerid, targetobj){
	//alert(url)
	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
		return false
	var ullist=targetobj.parentNode.parentNode.getElementsByTagName("div")
	intPanelTab = 0; 
	for (var i=0; i<ullist.length; i++)
		if(ullist[i].getElementsByTagName("a")[0])
			ullist[i].className = InActiveClassName;  //deselect all tabs
		//else
		//	ullist[i].className = EmptyClassName;
		targetobj.parentNode.className=ActiveClassName  //highlight currently clicked on tab
		for (var i=0; i<ullist.length; i++)
		{
			if(ullist[i].getElementsByTagName("a")[0] && ullist[i].className==ActiveClassName)
				ActivePanelTab = intPanelTab;
			intPanelTab++;
		}
		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){
	//alert(page_request.responseText);
	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(){
	
	intPanelTab = 0; 
	for (var i=0; i<arguments.length; i++){ //loop through passed UL ids
		var ulobj=document.getElementById(arguments[i]);
		var ulist=ulobj.getElementsByTagName("div"); //array containing the LI elements within UL 
		for (var x=0; x<ulist.length; x++){ //loop through each LI element
			if(ulist[x].getElementsByTagName("a")[0])
			{
				var ulistlink=ulist[x].getElementsByTagName("a")[0]
				if (ulistlink.getAttribute("rel")){
				intPanelTab++;
					
					
					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==ActiveClassName || intPanelTab == ActivePanelTab){
						ActivePanelTab = intPanelTab;
						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
					}
					else
					{
						ulist[x].className = InActiveClassName
					}
				}
			}
			else
			{
				ulist[x].className = EmptyClassName				
			}
		}
	}
}