代码模块一：dmenu tree 2

10月 28

代码模块一：dmenu tree 2

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纯粹使用CSS来实现的二级菜单（IE下需要JS协助）。但是可扩展性不是很好，难以发展为多级菜单。每增加一级，CSS就要进行相应的修改和增加。不过，使用CSS来作二级菜单也已经很COOL了。
来源： http://www.marktip.com/blog/article.asp?id=81

<!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>

<title>Horizontal Drop Down Menus</title>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<script type="text/javascript">

// JavaScript Document

startList = function() {

if (document.all&&document.getElementById) {

navRoot = document.getElementById("nav");

for (i=0; i<navRoot.childNodes.length; i++) {

node = navRoot.childNodes[i];

if (node.nodeName=="LI") {

node.onmouseover=function() {

this.className+=" over";

}

node.onmouseout=function() {

this.className=this.className.replace(" over", "");

}

}

}

}

}

window.onload=startList;

</script>

<style type="text/css">

body {

font: normal 11px verdana;

}

ul {

margin: 0;

padding: 0;

list-style: none;

width: 150px; /* Width of Menu Items */

border-bottom: 1px solid #ccc;

}

ul li {

position: relative;

}

li ul {

position: absolute;

left: 149px; /* Set 1px less than menu width */

top: 0;

display: none;

}

/* Styles for Menu Items */

ul li a {

display: block;

text-decoration: none;

color: #777;

background: #fff; /* IE6 Bug */

padding: 5px;

border: 1px solid #ccc;

border-bottom: 0;

}

/* Fix IE. Hide from IE Mac \*/

* html ul li { float: left; height: 1%; }

* html ul li a { height: 1%; }

/* End */

ul li a:hover { color: #E2144A; background: #f9f9f9; } /* Hover Styles */

li ul li a { padding: 2px 5px; } /* Sub Menu Styles */

li:hover ul, li.over ul { display: block; } /* The magic */

</style>

</head>

<body>

<ul id="nav">

<li><a href="#">Home</a></li>

<li><a href="#">About</a>

<ul>

<li><a href="#">History</a></li>

<li><a href="#">Team</a></li>

<li><a href="#">Offices</a></li>

</ul>

</li>

<li><a href="#">Services</a>

<ul>

<li><a href="#">Web Design</a></li>

<li><a href="#">Internet Marketing</a></li>

<li><a href="#">Hosting</a></li>

<li><a href="#">Domain Names</a></li>

<li><a href="#">Broadband</a></li>

</ul>

</li>

<li><a href="#">Contact Us</a>

<ul>

<li><a href="#">United Kingdom</a></li>

<li><a href="#">France</a></li>

<li><a href="#">USA</a></li>

<li><a href="#">Australia</a></li>

</ul>

</li>

</ul>

</body>

</html>

点击察看示例