Javascript +CSS横向三级导航菜单
日期：2013-07-06 浏览次数：21297 次
<!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> ĵ</title>
<style>
body {
margin: 7px;
font:12px Verdana, Arial, Helvetica, sans-serif;
}
* {
list-style-type: none;
margin: 0px;
padding: 0px;
border: thin none;
}
#nav {
position: absolute;
font-size: 9px;
opacity: 0.8;
}
#nav a {
display: block;
width: 100px;
height: 15px;
padding: 3px 5px 12px;
background: #666;
color: #fff;
text-decoration: none;
}
#nav a:hover {
background: #333;
}
#nav li {
width: 120px;
height:30px;
overflow:hidden;
background: #ccc;
padding-bottom: 3px;
}
#nav ul {
position: absolute;
margin-left: 110px;
margin-top: -30px;
}
html>body #nav ul {
margin-left: 119px;
margin-top: -39px;
}
#nav ul {
display: none;
}
#nav li.show ul {
display: block;
}
#nav li.show li ul {
display: none;
}
#nav li li.show ul {
display: block;
}
</style>
<script language="javascript" type="text/javascript">
function menuFix() {
var sfEls = document.getElementById("nav").getElementsByTagName("li");
for (var i=0; i<sfEls.length; i++) {
sfEls[i].onmouseover=function() {
this.className+=(this.className.length>0? " ": "") + "show";
}
sfEls[i].onmouseout=function() {
this.className=this.className.replace(new RegExp("( ?|^)show\\b"), "");
}
}
}
window.onload=menuFix;
</script>
</head>
<body>
<ul id="nav">
<li><a href="#">nav item</a>.
<ul>
<li><a href="#">nav item</a>.
<ul>
<li><a href="#">nav item</a>.</li>
<li><a href="#">nav item</a>.</li>
</ul>
</li>
<li><a href="#">nav item</a>.
<ul>
<li><a href="#">nav item</a></li>
<li><a href="#">nav item</a></li>
<li><a href="#">nav item</a></li>
<li><a href="#">nav item</a></li>
<li><a href="#">nav item</a></li>
<li><a href="#">nav item</a></li>
