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

////NO NEED TO EDIT BELOW////////////////////////
var loadedobjects=""
var defaultcontentarray=new Object()
var bustcacheparameter=""
var ajaxkeyparam=""

function ajaxpage(url, containerid, targetobj,ajaxkey){
	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("menubut")
	for (var i=0; i<ullist.length; i++)
		ullist[i].className=""  //deselect all tabs
	targetobj.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()
		ajaxkeyparam=(url.indexOf("?")!=-1)? "&ajaxkey="+ajaxkey : "?ajaxkey="+ajaxkey
	}
	page_request.open('GET', url+ajaxkeyparam+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 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 changePath(path){
	document.title = "ΕΒΗ : " + path;
}

function startajaxtabs(ajaxkey){
	//for (var i=0; i<arguments.length; i++){ //loop through passed UL ids
	//var ulobj=document.getElementById(arguments[i])
	var ulist=document.getElementsByName("menubut") //array containing the name elements menubut
	for (var x=0; x<ulist.length; x++){ //loop through each element
		//var ulistlink=ulist[x].getElementsByTagName("a")[0]
		//alert(ulist[x]);
		if (ulist[x].getAttribute("rel")){
			var modifiedurl=ulist[x].getAttribute("href").replace(/^http:\/\/[^\/]+\//i, "http://"+window.location.hostname+"/")
			ulist[x].setAttribute("href", modifiedurl) //replace URL's root domain with dynamic root domain, for ajax security sake
			savedefaultcontent(ulist[x].getAttribute("rel")) //save default ajax tab content
			ulist[x].onclick=function(){
				ajaxpage(this.getAttribute("href"), this.getAttribute("rel"), this, ajaxkey)
				changePath(this.getAttribute("alt"))
				loadobjs(this.getAttribute("rev"))
				return false
			}
			if (ulist[x].className=="selected"){
				ajaxpage(ulist[x].getAttribute("href"), ulist[x].getAttribute("rel"), ulist[x], ajaxkey) //auto load currenly selected tab content
				loadobjs(ulist[x].getAttribute("rev")) //auto load any accompanying .js and .css files
			}
		}
	}
	//}
}