第一种:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style type="text/css">
a
{
display:block;
height:22px;
width:90px;
font-size:15px;
padding-top:5px;
text-decoration:none;
background-color:#CCCCCC;
border-bottom:2px red solid;
}
a:hover
{
background-color:#0000FF;
color:#FFFFFF;
}
.menu .submenu
{
float:left;
margin:0px;
}
.menu .submenu ul
{
list-style-type:none;
margin:0px;
}
.menu .submenu ul li
{
display:none;
}
</style>
<script language="javascript">
function mydeel(obj,isshow)
{
var objs = obj.getElementsByTagName("li");
for(var i=0;i<objs.length;i++)
{
if(isshow==true)
{
objs[i].style.display="block";
}
else
{
objs[i].style.display="none";
}
}
}
window.onload=function()
{
var objs_li_1 = document.getElementById("mymenu").getElementsByTagName("li");
for(var i=0;i<objs_li_1.length;i++)
{
if(objs_li_1[i].className=="submenu")
{
var ul_2 = objs_li_1[i].getElementsByTagName("ul")[0];
ul_2.onmouseover=function()
{
mydeel(this,true);
};
ul_2.onmouseout=function()
{
mydeel(this,false);
};
}
}
}
</script>
</head>
<body>
<ul class="menu" id="mymenu">
<li class="submenu">
<ul><
