function openWindow(address,width,height)
  {
     win1 = window.open(address,'', 'width=' + width + ',height=' + height + ',toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes, marginwidth=50');
  }
  
  function rolldown(object)
{ 
roller=document.getElementById(object);
if (roller.style.display == "none")
{ roller.style.display = ""; 

} 
else 
{ roller.style.display = "none";
 }
}