//** Tab Content script- © Dynamic Drive DHTML code library (http://www.dynamicdrive.com)
//** Last updated: Nov 8th, 06

var enabletabpersistence=1; //enable tab persistence via session only cookies, so selected tab is remembered?

////NO NEED TO EDIT BELOW////////////////////////
var tabcontentIDs=new Object();

function expandcontent(linkobj){
	var ulid=linkobj.parentNode.parentNode.id; //id of UL element
	var ullist=document.getElementById(ulid).getElementsByTagName("li"); //get list of LIs corresponding to the tab contents
	for (var i=0; i<ullist.length; i++){
		ullist[i].className="";  //deselect all tabs
		if (typeof tabcontentIDs[ulid][i]!="undefined") //if tab content within this array index exists (exception: More tabs than there are tab contents)
			document.getElementById(tabcontentIDs[ulid][i]).style.display="none"; //hide all tab contents
	}
	linkobj.parentNode.className="selected";  //highlight currently clicked on tab
	document.getElementById(linkobj.getAttribute("rel")).style.display="block"; //expand corresponding tab content
	saveselectedtabcontentid(ulid, linkobj.getAttribute("rel"));
}

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"))
		expandcontent(thetab);
}

function savetabcontentids(ulid, relattribute){// save ids of tab content divs
	if (typeof tabcontentIDs[ulid]=="undefined") //if this array doesn't exist yet
		tabcontentIDs[ulid]=new Array();
	tabcontentIDs[ulid][tabcontentIDs[ulid].length]=relattribute;
}

function saveselectedtabcontentid(ulid, selectedtabid){ //set id of clicked on tab as selected tab id & enter into cookie
	if (enabletabpersistence==1) //if persistence feature turned on
		setCookie(ulid, selectedtabid);
}

function getullistlinkbyId(ulid, tabcontentid){ //returns a tab link based on the ID of the associated tab content
	var ullist=document.getElementById(ulid).getElementsByTagName("li")
	for (var i=0; i<ullist.length; i++){
		if (ullist[i].getElementsByTagName("a")[0].getAttribute("rel")==tabcontentid){
			return ullist[i].getElementsByTagName("a")[0];
			break;
		}
	}
}

function initializetabcontent(){
	for (var i=0; i<arguments.length; i++){ //loop through passed UL ids
		if (enabletabpersistence==0 && getCookie(arguments[i])!="") //clean up cookie if persist=off
			setCookie(arguments[i], "");
		var clickedontab=getCookie(arguments[i]); //retrieve ID of last clicked on tab from cookie, if any
		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")){
				savetabcontentids(arguments[i], ulistlink.getAttribute("rel")); //save id of each tab content as loop runs
				ulistlink.onclick=function(){
					expandcontent(this);
					return false;
				}
				if (ulist[x].className!="selected" && clickedontab=="") //if a tab is set to be selected by default
					expandcontent(ulist[0].getElementsByTagName("a")[0]); //auto load currenly selected tab content
			}
		} //end inner for loop
		if (clickedontab!=""){ //if a tab has been previously clicked on per the cookie value
			var culistlink=getullistlinkbyId(arguments[i], clickedontab);
			if (typeof culistlink!="undefined") //if match found between tabcontent id and rel attribute value
				expandcontent(culistlink); //auto load currenly selected tab content
			else //else if no match found between tabcontent id and rel attribute value (cookie mis-association)
				expandcontent(ulist[0].getElementsByTagName("a")[0]); //just auto load first tab instead
			}
		} //end outer for loop
	}


	function getCookie(Name){
		var re=new RegExp(Name+"=[^;]+", "i"); //construct RE to search for target name/value pair
		if (document.cookie.match(re)) //if cookie found
			return document.cookie.match(re)[0].split("=")[1]; //return its value
		return "";
	}

	function setCookie(name, value){
		document.cookie = name+"="+value; //cookie value is domain wide (path=/)
	}