function openPopup(anchor, w, h)
{
  if (!anchor.href) return;
  window.open(anchor.href, "","toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,top=-1,left=-1,width=" + (w?w:640) + ",height=" + (h?h:480));
  return false;
}