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

var enabletabpersistence=0; //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(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
                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=/)
}