//** 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)
{
        // id of UL element
    var ulid=linkobj.parentNode.parentNode.id;
        // get list of LIs corresponding to the tab contents
    var ullist=document.getElementById(ulid).getElementsByTagName("li");

    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)
                //hide all tab contents
            document.getElementById(tabcontentIDs[ulid][i]).style.display="none";
    }

        // highlight currently clicked on tab
    linkobj.parentNode.className="selected";
        // expand corresponding tab content
    document.getElementById (linkobj.getAttribute("rel")).style.display="block";
    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 this array doesn't exist yet
    if (typeof tabcontentIDs[ulid] == "undefined")
        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 persistence feature turned on
    if (enabletabpersistence == 1)
        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], "");

            // retrieve ID of last clicked on tab from cookie, if any
        var clickedontab = getCookie(arguments[i]);
        var ulobj = document.getElementById(arguments[i]);
            // array containing the LI elements within UL
        var ulist = ulobj.getElementsByTagName("li");

        for (var x = 0; x < ulist.length; x++)
            // loop through each LI element
        {
            var ulistlink = ulist[x].getElementsByTagName("a")[0];
            if (ulistlink.getAttribute("rel"))
            {
                    // save id of each tab content as loop runs
                savetabcontentids (arguments[i], ulistlink.getAttribute("rel"));
                ulistlink.onclick = function()
                {
                    expandcontent (this);
                    return false;
                }

                    // if a tab is set to be selected by default
                if (ulist[x].className == "selected" && clickedontab == "")
                        // auto load currenly selected tab content
                    expandcontent (ulistlink);
            }
        } // end inner for loop

            // if a tab has been previously clicked on per the cookie value
        if (clickedontab != "")
        {
            var culistlink = getullistlinkbyId (arguments[i], clickedontab);

                //if match found between tabcontent id and rel attribute value
            if (typeof culistlink != "undefined")
                    //auto load currenly selected tab content
                expandcontent (culistlink);
            else
                // else if no match found between tabcontent id and rel
                // attribute value (cookie mis-association)
                    //just auto load first tab instead
                expandcontent (ulist[0].getElementsByTagName("a")[0]);
        }
    } // end outer for loop
}

function getCookie (Name)
{ 
        //construct RE to search for target name/value pair
    var re = new RegExp(Name+"=[^;]+", "i");
    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=/)
}