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

  return false;
}