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

var enabletabpersistence=0 //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=/)
}