随着网站内容的不断增加，我们需要对其进行分类整理，而随之而来的就是网站栏目的增加。
那怎么能把所有的栏目显示出来呢？
下面我为大家提供一段栏目导航代码。
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<link rel="stylesheet" type="text/css" href="css/css.css" />
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<meta name="keywords" content="JS代码,菜单导航,JS广告代码,JS特效代码" />
<meta name="description" content="此代码内容为3级横向导航菜单，属于站长常用代码，更多菜单导航代码请访问懒人图库JS代码频道。" />
<title>3级横向导航菜单_懒人图库</title>
<script type="text/javascript">
//SuckerTree Vertical Menu (Aug 4th, 06)
//By Dynamic Drive: http://www.dynamicdrive.com/style/
var menuids=["suckertree1"] //Enter id(s) of SuckerTree UL menus, separated by commas
function buildsubmenus(){
for (var i=0; i<menuids.length; i++){
var ultags=document.getElementById(menuids[i]).getElementsByTagName("ul")
for (var t=0; t<ultags.length; t++){
ultags[t].parentNode.getElementsByTagName("a")[0].className="subfolderstyle"
ultags[t].parentNode.onmouseover=function(){
this.getElementsByTagName("ul")[0].style.display="block"
}
ultags[t].parentNode.onmouseout=function(){
this.getElementsByTagName("ul")[0].style.display="none"
}
}
}
}
for (var i=0; i<menuids.length; i++){
var ultags=document.getElementById(menuids[i]).getElementsByTagName("ul")
for (var t=0; t<ultags.length; t++){
ultags[t].parentNode.getElementsByTagName("a")[0].className="subfolderstyle"
ultags[t].parentNode.onmouseover=function(){
this.getElementsByTagName("ul")[0].style.display="block"
}
ultags[t].parentNode.onmouseout=function(){
this.getElementsByTagName("ul")[0].style.display="none"
}
}
}
}
if (window.addEventListener)
window.addEventListener("load", buildsubmenus, false)
else if (window.attachEvent)
window.attachEvent("onload", buildsubmenus)
</script>
<style type="text/css">
.suckerdiv ul { margin: 0; padding: 0; list-style-type: none; width: 150px; /* Width of Menu Items */ border-bottom: 1px solid #ccc; }
.suckerdiv ul li { position: relative; }
/*1st level sub menu style */
.suckerdiv ul li ul { left: 149px; /* Parent menu width - 1*/ position: absolute; width: 160px; /*sub menu width*/ top: 0; display: none; }
/*All subsequent sub menu levels offset */
.suckerdiv ul li ul li ul { left: 159px; /* Parent menu width - 1*/ }
/* menu links style */
.suckerdiv ul li a { display: block; color: black; text-decoration: none; font:12px 宋体; background: #fff; padding: 5px 5px; border: 1px solid #ccc; border-bottom: 0; }
.suckerdiv ul li a:visited { color: black; }
.suckerdiv ul li a:hover { color: white; background-color: gray; }
.suckerdiv .subfolderstyle { background: url(../images/arrow-list.gif) no-repeat center right; }
/* Holly Hack for IE \*/
* html .suckerdiv ul li { float: left; height: 1%; }
* html .suckerdiv ul li a { height: 1%; }
/* End */
window.addEventListener("load", buildsubmenus, false)
else if (window.attachEvent)
window.attachEvent("onload", buildsubmenus)
</script>
<style type="text/css">
.suckerdiv ul { margin: 0; padding: 0; list-style-type: none; width: 150px; /* Width of Menu Items */ border-bottom: 1px solid #ccc; }
.suckerdiv ul li { position: relative; }
/*1st level sub menu style */
.suckerdiv ul li ul { left: 149px; /* Parent menu width - 1*/ position: absolute; width: 160px; /*sub menu width*/ top: 0; display: none; }
/*All subsequent sub menu levels offset */
.suckerdiv ul li ul li ul { left: 159px; /* Parent menu width - 1*/ }
/* menu links style */
.suckerdiv ul li a { display: block; color: black; text-decoration: none; font:12px 宋体; background: #fff; padding: 5px 5px; border: 1px solid #ccc; border-bottom: 0; }
.suckerdiv ul li a:visited { color: black; }
.suckerdiv ul li a:hover { color: white; background-color: gray; }
.suckerdiv .subfolderstyle { background: url(../images/arrow-list.gif) no-repeat center right; }
/* Holly Hack for IE \*/
* html .suckerdiv ul li { float: left; height: 1%; }
* html .suckerdiv ul li a { height: 1%; }
/* End */
</style>
</head>
<body>
</head>
<body>
<div class="suckerdiv">
<ul id="suckertree1">
<li><a href="#">Item 1</a></li>
<li><a href="#">Item 2</a></li>
<li><a href="#">Folder 1</a>
<ul>
<li><a href="#">Sub Item 1.1</a></li>
<li><a href="#">Sub Item 1.2</a></li>
</ul>
</li>
<li><a href="#">Item 3</a></li>
<ul id="suckertree1">
<li><a href="#">Item 1</a></li>
<li><a href="#">Item 2</a></li>
<li><a href="#">Folder 1</a>
<ul>
<li><a href="#">Sub Item 1.1</a></li>
<li><a href="#">Sub Item 1.2</a></li>
</ul>
</li>
<li><a href="#">Item 3</a></li>
<li><a href="#">Folder 2</a>
<ul>
<li><a href="#">Sub Item 2.1</a></li>
<li><a href="#">Folder 2.1</a>
<ul>
<li><a href="#">Sub Item 2.1.1</a></li>
<li><a href="#">Sub Item 2.1.2</a></li>
<li><a href="#">Sub Item 2.1.3</a></li>
<li><a href="#">Sub Item 2.1.4</a></li>
</ul>
</li>
</ul>
</a>
</li>
<li><a href="#">Item 4</a></li>
</ul>
</div>
</body>
</html>
<ul>
<li><a href="#">Sub Item 2.1</a></li>
<li><a href="#">Folder 2.1</a>
<ul>
<li><a href="#">Sub Item 2.1.1</a></li>
<li><a href="#">Sub Item 2.1.2</a></li>
<li><a href="#">Sub Item 2.1.3</a></li>
<li><a href="#">Sub Item 2.1.4</a></li>
</ul>
</li>
</ul>
</a>
</li>
<li><a href="#">Item 4</a></li>
</ul>
</div>
</body>
</html>
