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

var enabletabpersistence=0; // turn cookie persistence off
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"));
}


//interface for selecting a tab (plus expand corresponding content)
function expandtab(tabcontentid, tabnumber)
{ 
   var thetab=document.getElementById(tabcontentid).getElementsByTagName("a")[tabnumber];
   if (thetab.getAttribute("rel"))
      expandcontent(thetab);
}


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

   tabcontentIDs[ulid][tabcontentIDs[ulid].length]=relattribute;
}


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


//returns 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;
      }
   }
}


function initializetabcontent(id)
{
   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()
            {
					if (this.rel == "tcontent1") // contents tab
					{
						// display the highlighted node
						if (selectedNode.href != null && selectedNode.href != "undefined")
							parent.frames["contentwin"].location.href = selectedNode.href;
					}
					else if (this.rel == "tcontent2") // index tab
					{
					}
					// clear the right frame
					else if (this.rel == "tcontent3")  // search tab
					{
						parent.frames["contentwin"].location.href = "about:blank";
					}

               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
   
   // initialize the loading icon in the search tab 
   document.getElementById("loading").style.visibility = "hidden";
}


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=/)
}