//** Tab Content script- © Dynamic Drive DHTML code library (http://www.dynamicdrive.com)
//** Last updated: June 29th, 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
    //alert(ulid)
    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 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)
    //alert(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 removetabfromquerystring()
{
    var q = window.location.search;
    q = q.replace(/tab=[^\&]*\&?/, "");
    window.location.search = q;
}

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
            }
        }
        
        if (typeof (getQueryVariable("tab")) != "undefined") {
            
            var tab = getQueryVariable("tab"); 
            removetabfromquerystring();                      
            clickedontab = tab;
            
            for (var x=0; x<ulist.length; x++){ //loop through each LI element
                var ulistlink=ulist[x].getElementsByTagName("a")[0]
                
                if (tab == ulistlink.getAttribute("rel")) {
                    expandcontent(ulistlink);
                }
            }           
        }
        
        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(ulistlink) //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
        {
            //alert(culistlink)
            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
    {
        var res = document.cookie.match(re)[0].split("=")[1] //return its value        
        return res;
    }
    return ""
}

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

function getQueryVariable(variable) {
    var query = window.location.search.substring(1);
    var vars = query.split("&");
    for (var i=0;i<vars.length;i++) {
        var pair = vars[i].split("=");
        if (pair[0] == variable) {
            return pair[1];
        }
    }   
}