<script type='text/javascript'>
  function windowpop(url, width, height) {
      var leftPosition, topPosition;
      //Allow for borders.
      leftPosition = (window.screen.width / 2) - ((width / 2) + 10);
      //Allow for title and status bars.
      topPosition = (window.screen.height / 2) - ((height / 2) + 50);
      //Open the window.
      window.open(url+document.URL, "Window2", "status=no,height=" + height + ",width=" + width + ",resizable=yes,left=" + leftPosition + ",top=" + topPosition + ",screenX=" + leftPosition + ",screenY=" + topPosition + ",toolbar=no,menubar=no,scrollbars=no,location=no,directories=no");
  }</script>