function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}

ok=0; old_what="non";
function show(what)
{
   if((old_what != "non") && (what != old_what))
   {
         ok=1;

      old_what.style.display="none";
      what.style.display="";
   }
   else
   {
      if(ok)
	  {
          ok=0;
          what.style.display="none";
      }
	  else
      {
          ok=1;
          what.style.display="";
      }
  }
  old_what=what;
}