function xMenu1(triggerId, menuId, mouseMargin, openEvent)
{
  var isOpen = false;
  var trg = xGetElementById(triggerId);
  var mnu = xGetElementById(menuId);
  if (trg && mnu) {
    xAddEventListener(trg, openEvent, onOpen, false);
  }
  function onOpen()
  {
    if (!isOpen) {
      //xMoveTo(mnu, xPageX(trg), xPageY(trg));
      xShow(mnu);
      xAddEventListener(document, 'mousemove', onMousemove, false);
      isOpen = true;
    }
  }
  function onMousemove(ev)
  {
    var e = new xEvent(ev);
    if (!xHasPoint(mnu, (e.pageX - e.offsetX), (e.pageY - e.offsetY), -mouseMargin) &&
        !xHasPoint(trg, (e.pageX - e.offsetX), (e.pageY - e.offsetY), -mouseMargin))
    {
      xHide(mnu);
      xRemoveEventListener(document, 'mousemove', onMousemove, false);
      isOpen = false;
    }
  }
} // end xMenu1