var bustcachevar=1 //bust potential caching of external pages after initial request? (1=yes, 0=no)
var loadstatustext="<img src='ajaxtabs/loading.gif' /> Requesting content..."

////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
		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)
	}
//} // this was just added - is it needed?


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 expandtab(tabcontentid, tabnumber){ //interface for selecting a tab (plus expand corresponding content)
	var thetab=document.getElementById(tabcontentid).getElementsByTagName("a")[tabnumber]
	if (thetab.getAttribute("rel")){
		ajaxpage(thetab.getAttribute("href"), thetab.getAttribute("rel"), thetab)
		loadobjs(thetab.getAttribute("rev"))
	}
}

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
		}
	}
}

}
}