var oldie = document.getElementById?0:1
    
    function changestate(tid){
      for (i=1; i<=totdivs; i++) {
       id="subtop"+i;
       document.getElementById("top"+i).className="cont";
         if (document.getElementById(id)) {
             if  (oldie)  {document.all[id].style.display='none';} 
             else 
                { document.getElementById(id).style.display='none'; }
         }
       }
       if (document.getElementById("subtop"+tid)) {
          document.getElementById("top"+tid).className="contbg";
          document.getElementById("subtop"+tid).style.display="block"; 
       }
       document.getElementById("top"+tid).className="contbg";
    }