if (ie)
	{
		document.body.onclick = hideAll;
		document.body.onscroll = hideAll;
		document.body.onmousemove = updateIt;
	}
	if (n)
	{
		document.onmousedown = hideAll;
		window.captureEvents(Event.MOUSEMOVE);
		window.onmousemove = updateIt;
	}

	UpdateIt();					// 定时捕获 Events 以检查菜单状态