function popupWin(winUrl, winId, wd, ht) {
  var lft = Math.floor((screen.width - wd) / 2);
  var tp = Math.floor((screen.height - ht) / 2);
  var wstat = 'resizable=yes,scrollbars=yes,status=no,width='+wd+',height='+ht+',left='+lft+',top='+tp;
  var w = window.open(winUrl, winId, wstat);
}