//** 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(){
  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=/)
}