function popup(url, name, height, width, scrollbars)
{
  var popwin;
  var opts = "toolbar=yes,status=no,location=no,menubar=yes,resizable=no";opts += ",height=" + height + ",width=" + width + 
",scrollbars=" + scrollbars;
 
  popwin = window.open("", name, opts);
  popwin.focus();
  popwin.location = url; 
}