function openWindow(url, name, w, h) {
  var resize = "";

var winl = (screen.width - w) / 2;
var wint = (screen.height - h) / 2;

  popupWin = window.open(url, name, 'scrollbars=no,' + resize +
'width=' + w + ',height=' + h + ',top='+wint+',left='+winl+',status=no');
}