how do I center javascript css popup div, no matter what the screen resolution?

Question

I have the following code that opens a new popup window while disabling the background, the problem is that I have to position this so that it\'s 100px from the top (already got

Answer 1

A quick Google search found this;

function PopupCenter(pageURL, title,w,h) {
  var left = (screen.width/2)-(w/2);
  var top = (screen.height/2)-(h/2);
  var targetWin = window.open (pageURL, title, 'toolbar=no, location=no, directories=no, status=no, menubar=no, scrollbars=no, resizable=no, copyhistory=no, width='+w+', height='+h+', top='+top+', left='+left);

}