//************** Open Center Window Function
 function openCenteredWindow(url, height, width, name, parms) {
  if (height <= 1) { height = Math.floor(screen.height * height); }
  if (width <= 1) { width = Math.floor(screen.width * width); }
  var left = Math.floor( (screen.width - width) / 2);
  var top = Math.floor( (screen.height - height) / 2);
  var winParms = "top=" + top + ",left=" + left + ",height=" + height + ",width=" + width;
  if (parms) { winParms += "," + parms; }
  var win = window.open(url, name, winParms);
  
  if (win == null) {
    return null;
  }
  
  return win;
 }
//************** End Open Center Window Function