屡试不成功！！求鼠标经过菜单延迟响应事件（以下面代码为例），javascript，，感激不尽啊

我在某个地方下载的代码，但是在ie调试的时候，鼠标已经过菜单闪动的好快，感觉不好，想要鼠标经过延迟响应求大神帮忙解决<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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