本文提供了一段使用CSS和JavaScript实现的二级菜单代码示例。该代码通过简单的HTML结构结合CSS样式及JavaScript事件处理实现了当鼠标悬停在一级菜单项上时显示二级菜单的效果。适用于网页导航栏的设计。
不错的二级菜单代码,采用CSS+JS.html
<!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=gb2312" />
<title>nav</title>
<script language="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; /* IE6 Bug */
border-bottom: 0;
}
/* Holly Hack. IE Requirement */
* html ul li { float: left; height: 1%; }
* html ul li a { height: 1%; }
/* End */
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>
<!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=gb2312" /><title>nav</title><script language="javascript">
// JavaScript DocumentstartList = function() {
startList 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; /* IE6 Bug */ border-bottom: 0; } /* Holly Hack. IE Requirement */* html ul li { float: left; height: 1%; }* html ul li a { height: 1%; }/* End */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>
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