var bustcachevar = 1; //bust potential caching of external pages after initial request? (1=yes, 0=no)
var loadstatustext = "";

////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("div");
	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;
		fontSizer.rebuild();
	}
}

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
}
}
}
	fontSizer.rebuild();
}

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 expandtab_woningen(tabcontentid, tabnumber, page, var1, var2, var3, sortering, landurl, projecturl){ //interface for selecting a tab (plus expand corresponding content)
var thetab=document.getElementById(tabcontentid).getElementsByTagName("a")[tabnumber]
if (thetab.getAttribute("rel")){
ajaxpage("http://" + window.location.hostname + "/woningen/" + landurl + "/" + projecturl + "/?PAGE=" + page + "&VAR1=" + var1 + "&VAR2=" + var2 + "&VAR3=" + var3 + "&SORT=" + sortering + "&HOSTNAME=" + window.location.hostname + "", 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("div"); //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
				}
			}
		}
	}
}