var id = null;
    
    function movePanel() {
      var pnl = $get("ModalPanel");
      if (pnl != null) {
        pnl.style.left = "50px";
        pnl.style.top = "100px";
        id = setTimeout("movePanel();", 100);
      }
    }
    
    function stopMoving() {
      clearTimeout(id);
  }