//** 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(TabMainName, SelectedTab){
    if (enabletabpersistence==0 && getCookie(TabMainName)!="") //clean up cookie if persist=off
        setCookie(TabMainName, "")
    
    setCookie(TabMainName, SelectedTab)
    
    var clickedontab=getCookie(TabMainName) //retrieve ID of last clicked on tab from cookie, if any
    var ulobj=document.getElementById(TabMainName)
    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(TabMainName, 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(TabMainName, 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
    }
}


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=/)
}