var bustcachevar=1 //bust potential caching of external pages after initial request? (1=yes, 0=no)
var loadstatustext="<div style='direction:rtl; text-align:center;font-family:tahoma;font-size:10px;'><img src='Images/ajax-loader.gif' align='absmiddle' /><br/>بارگذاری...</div>"

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)
}

function ajaxpageSingle(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)
}

function loadpage(page_request, containerid){
	try
	{	
		if (page_request.readyState == 4 && (page_request.status==200 || window.location.href.indexOf("http")==-1))
		{
			document.getElementById(containerid).innerHTML=page_request.responseText;
			//alert("containerid: " + containerid + " - "+page_request.responseText);
		}
	}catch(e){
		alert("loadpage--> " + e.message + " - readyState:" + page_request.readyState + " - status:" + page_request.status);
	}
}

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];	
	var showTabId = $(tabcontentid).id.substring(7,$(tabcontentid).id.length);
	showTabId = "tabHeader" + showTabId;
	var tabs
	if ((document.getElementById(showTabId) != null) && (document.getElementById(showTabId) != "nothing"))
	{
		tabs = document.getElementById(showTabId).getElementsByTagName("div");
		if (tabs[tabnumber].className == "unselectedTab")
		{//if the tab is the curent selected tab, exit function
			if (thetab.getAttribute("rel"))
			{
				ajaxpage(thetab.getAttribute("href"), thetab.getAttribute("rel"), thetab)
				//loadobjs(thetab.getAttribute("rev"))
			}
			//Change All Tabs Class, to Unselected
			for (var i = 0; i < tabs.length; i++)
				tabs[i].className = "unselectedTab";
			//Show All Tab Seperators
			for (var i = 0; i < tabs.length - 1; i++)
			{
				var tabSep = tabs[i].getElementsByTagName("img")[0];
				if (tabSep != null)
					tabSep.style.visibility = "";
			}
			//Hidding Tab Seperator of Neighbor of Selected Tab
			if (tabnumber > 0)
			{
				var tabSep = tabs[tabnumber - 1].getElementsByTagName("img")[0];
				tabSep.style.visibility = "hidden";
			}
			//Change Selected Tabs Class to selected
			tabs[tabnumber].className = "selectedTab";
			tabItemMousOut(tabs[tabnumber]);
			//customize first tab
			if (tabnumber == 0)
				tabs[tabnumber].style.borderRight= "none";
			//customize last tab
			if (tabnumber == (tabs.length -1))
				tabs[tabnumber].style.borderLeft= "none";
		}
	}
}

function expandSinglTab(tabcontentid, tabnumber)
{
	var thetab=document.getElementById(tabcontentid).getElementsByTagName("a")[tabnumber]
	if (thetab.getAttribute("rel"))
		ajaxpageSingle(thetab.getAttribute("href"), thetab.getAttribute("rel"), thetab)
}
function tabItemMousOver(item)
{
	if (item.className == "unselectedTab")
		item.style.textDecoration = 'underline';
}

function tabItemMousOut(item)
{
	item.style.textDecoration = '';
}

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
}
}
}
}
}