// JavaScript Document
function changStyle(ctrlobj)
{
   if (ctrlobj==1){        
    document.getElementById("sa1").style.display='';
    document.getElementById("sa2").style.display='none';
    document.getElementById("tab1").className='middletabbg1';
    document.getElementById("tab2").className='middletabbg2';
   }
   if (ctrlobj==2)
  {        
    document.getElementById("sa1").style.display='none';
    document.getElementById("sa2").style.display='';
    document.getElementById("tab1").className='middletabbg2';
    document.getElementById("tab2").className='middletabbg1';
   }
 }