function OpenWindow(obj) {
  var left = (screen.width - 650) / 2;
  var top = (screen.height - 405) / 2;
  var props = "width=650,height=405,left=" + left + ",top=" + top;
  var newwindow = window.open("virtualtour/index.htm", "_new", props);
//  if (newwindow == null)
//    return true;
//  else
//    return false;
}