function popup(src,h,w) {
  if (!h)
    h = 300;
  if (!w)
    w = 550;
  win = window.open(src,"","top=20,left=20,height=" + h + ",width=" + w + ",toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=yes")
}