//enable tab persistence via session only cookies, so selected tab is remembered?
var enabletabpersistence=0 

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


//*****************************************************
// Function used to expand the content for a given tab
//*****************************************************
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 tab content within this array index exists (exception: More tabs than there are tab contents)
        if (typeof tabcontentIDs[ulid][i]!="undefined") 
            document.getElementById(tabcontentIDs[ulid][i]).style.display="none" //hide all tab contents
    } // end for loop

    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"))

} // end function


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

} // end function

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

} // end function


//**********************************************************************************
// Function used to return a tab link based on the ID of the associated tab content
//**********************************************************************************
function getullistlinkbyId(ulid, tabcontentid)
{
    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
        }
    } // end for loop
} // end function

//******************************************************************************
// Function must be called to initialize the tab content display
//******************************************************************************
function initializetabcontent()
{
    //loop through passed UL ids
    for (var i=0; i<arguments.length; i++)
    {     
        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

        //loop through each LI element
        for (var x=0; x<ulist.length; x++)
        { 
            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
} // end function


//******************************
// Function to look for a cookie
//******************************
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 ""
} // end function

//****************************
// Function used to set cookie
//****************************
function setCookie(name, value)
{
    document.cookie = name+"="+value //cookie value is domain wide (path=/)
} // end function