function popupwin(URLStr) {
	window.open('/popup.php?url='+URLStr,'','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=yes,copyhistory=yes,width=300,height=300');
}
function Blink(elem) {
  var obj = document.getElementById(elem);
  if (obj) obj.style.visibility = (obj.style.visibility == "" ? "hidden" : "");
}