Jquery的treeview很好用，如果是简单的树形菜单按照下面的源码实例模仿就可以。
<!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=iso-8859-1"/>
<title>jQuery treeview</title>
<link rel="stylesheet" href="jquery.treeview.css" />
<link rel="stylesheet" href="screen.css" />
<script src="lib/jquery.js" type="text/javascript"></script>
<script src="lib/jquery.cookie.js" type="text/javascript"></script>
<script src="jquery.treeview.js" type="text/javascript"></script>
<script type="text/javascript" src="demo.js"></script>
</head>
<body>
<h1 id="banner">jQuery Treeview Plugin Demo</h1>
<div id="main">
<a href="demo.js">Pagecode</a>
<h3>Other demos</h3>
<ul>
<li><a href="large.html">Large Tree Demo</a></li>
<li><a href="prerendered.html">Prerendered Large Tree Demo</a></li>
<li><a href="async.html">Async Tree Demo</a></li>
<li><a href="edit.html">Editable Tree Demo</a></li>
<li><a href="simple.html">Simple Tree Demo, famfamfam theme (no lines)</a></li>
</ul>
<h4>Sample 1 - default</h4>
<ul id="browser" class="filetree">
<li><span class="folder">Folder 1</span>
<ul>
<li><span class="file">Item 1.1</span></li>
</ul>
</li>
<li><span class="folder">Folder 2</span>
<ul>
<li><span class="folder">Subfolder 2.1</span>
<ul id="folder21">
<li><span class="file">File 2.1.1</span></li>
<li><span class="file">File 2.1.2</span></li>
</ul>
</li>
<li><span class="file">File 2.2</span></li>
</ul>
</li>
<li class="closed"><span class="folder">Folder 3 (closed at start)</span>
<ul>
<li><span class="file">File 3.1</span></li>
</ul>
</li>
<li><span class="file">File 4</span></li>
</ul>
<h4>Sample 2 - Navigation</h4>
<ul id="navigation">
<li><a href="?1">Item 1</a>
<ul>
<li><a href="?1.0">Item 1.0</a>
<ul>
<li><a href="?1.0.0">Item 1.0.0</a></li>
</ul>
</li>
<li><a href="?1.1">Item 1.1</a></li>
<li><a href="?1.2">Item 1.2</a>
<ul>
<li><a href="?1.2.0">Item 1.2.0</a>
<ul>
<li><a href="?1.2.0.0">Item 1.2.0.0</a></li>
<li><a href="?1.2.0.1">Item 1.2.0.1</a></li>
<li><a href="?1.2.0.2">Item 1.2.0.2</a></li>
</ul>
</li>
<li><a href="?1.2.1">Item 1.2.1</a>
<ul>
<li><a href="?1.2.1.0">Item 1.2.1.0</a></li>
</ul>
</li>
<li><a href="?1.2.2">Item 1.2.2</a>
<ul>
<li><a href="?1.2.2.0">Item 1.2.2.0</a></li>
<li><a href="?1.2.2.1">Item 1.2.2.1</a></li>
<li><a href="?1.2.2.2">Item 1.2.2.2</a></li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
<li><a href="?2">Item 2</a>
<ul>
<li><span>Item 2.0</span>
<ul>
<li><a href="?2.0.0">Item 2.0.0</a>
<ul>
<li><a href="?2.0.0.0">Item 2.0.0.0</a></li>
<li><a href="?2.0.0.1">Item 2.0.0.1</a></li>
</ul>
</li>
</ul>
</li>
<li><a href="?2.1">Item 2.1</a>
<ul>
<li><a href="?2.1.0">Item 2.1.0</a>
<ul>
<li><a href="?2.1.0.0">Item 2.1.0.0</a></li>
</ul>
</li>
<li><a href="?2.1.1">Item 2.1.1</a>
<ul>
<li><a href="?2.1.1.0abc">Item 2.1.1.0</a></li>
<li><a href="?2.1.1.1">Item 2.1.1.1</a></li>
<li><a href="?2.1.1.2">Item 2.1.1.2</a></li>
</ul>
</li>
<li><a href="?2.1.2">Item 2.1.2</a>
<ul>
<li><a href="?2.1.2.0">Item 2.1.2.0</a></li>
<li><a href="?2.1.2.1">Item 2.1.2.1</a></li>
<li><a href="?2.1.2.2">Item 2.1.2.2</a></li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
<li><a href="?3">Item 3</a>
<ul>
<li class="open"><a href="?3.0">Item 3.0</a>
<ul>
<li><a href="?3.0.0">Item 3.0.0</a></li>
<li><a href="?3.0.1">Item 3.0.1</a>
<ul>
<li><a href="?3.0.1.0">Item 3.0.1.0</a></li>
<li><a href="?3.0.1.1">Item 3.0.1.1</a></li>
</ul>
</li>
<li><a href="?3.0.2">Item 3.0.2</a>
<ul>
<li><a href="?3.0.2.0">Item 3.0.2.0</a></li>
<li><a href="?3.0.2.1">Item 3.0.2.1</a></li>
<li><a href="?3.0.2.2">Item 3.0.2.2</a></li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
</ul>
<h4>Sample 3 - fast animations, all branches collapsed at first, red theme, cookie-based persistance</h4>
<ul id="red" class="treeview-red">
<li><span>Item 1</span>
<ul>
<li><span>Item 1.0</span>
<ul>
<li><span>Item 1.0.0</span></li>
</ul>
</li>
<li><span>Item 1.1</span></li>
<li><span>Item 1.2</span>
<ul>
<li><span>Item 1.2.0</span>
<ul>
<li><span>Item 1.2.0.0</span></li>
<li><span>Item 1.2.0.1</span></li>
<li><span>Item 1.2.0.2</span></li>
</ul>
</li>
<li><span>Item 1.2.1</span>
<ul>
<li><span>Item 1.2.1.0</span></li>
</ul>
</li>
<li><span>Item 1.2.2</span>
<ul>
<li><span>Item 1.2.2.0</span></li>
<li><span>Item 1.2.2.1</span></li>
<li><span>Item 1.2.2.2</span></li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
<li><span>Item 2</span>
<ul>
<li><span>Item 2.0</span>
<ul>
<li><span>Item 2.0.0</span>
<ul>
<li><span>Item 2.0.0.0</span></li>
<li><span>Item 2.0.0.1</span></li>
</ul>
</li>
</ul>
</li>
<li><span>Item 2.1</span>
<ul>
<li><span>Item 2.1.0</span>
<ul>
<li><span>Item 2.1.0.0</span></li>
</ul>
</li>
<li><span>Item 2.1.1</span>
<ul>
<li><span>Item 2.1.1.0</span></li>
<li><span>Item 2.1.1.1</span></li>
<li><span>Item 2.1.1.2</span></li>
</ul>
</li>
<li><span>Item 2.1.2</span>
<ul>
<li><span>Item 2.1.2.0</span></li>
<li><span>Item 2.1.2.1</span></li>
<li><span>Item 2.1.2.2</span></li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
<li class="open"><span>Item 3</span>
<ul>
<li class="open"><span>Item 3.0</span>
<ul>
<li><span>Item 3.0.0</span></li>
<li><span>Item 3.0.1</span>
<ul>
<li><span>Item 3.0.1.0</span></li>
<li><span>Item 3.0.1.1</span></li>
</ul>
</li>
<li><span>Item 3.0.2</span>
<ul>
<li><span>Item 3.0.2.0</span></li>
<li><span>Item 3.0.2.1</span></li>
<li><span>Item 3.0.2.2</span></li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
</ul>
<h4>Sample 4 - two trees with one tree control, black and gray theme, cookie-based persistance</h4>
<div id="treecontrol">
<a title="Collapse the entire tree below" href="#"><img src="data:images/minus.gif" /> Collapse All</a>
<a title="Expand the entire tree below" href="#"><img src="data:images/plus.gif" /> Expand All</a>
<a title="Toggle the tree below, opening closed branches, closing open branches" href="#">Toggle All</a>
</div>
<ul id="black" class="treeview-black">
<li>Item 1</li>
<li>
<span>Item 2</span>
<ul>
<li>
<span>Item 2.1</span>
<ul>
<li>Item 2.1.1</li>
<li>Item 2.1.2</li>
</ul>
</li>
<li>Item 2.2</li>
<li class="closed">
<span>Item 2.3 (closed at start)</span>
<ul>
<li>Item 2.3.1</li>
<li>Item 2.3.2</li>
</ul>
</li>
</ul>
</li>
</ul>
<ul id="gray" class="treeview-gray">
<li>Item 1</li>
<li>
<span>Item 2</span>
<ul>
<li class="closed">
<span>Item 2.1 (closed at start)</span>
<ul>
<li>Item 2.1.1</li>
<li>Item 2.1.2</li>
</ul>
</li>
<li>Item 2.2.1</li>
<li>Item 2.2.2</li>
<li>Item 2.2.3</li>
<li>Item 2.2.4</li>
<li>Item 2.2.5</li>
<li>Item 2.2.6</li>
<li>Item 2.2.7</li>
<li>Item 2.2.8</li>
<li>
<span>Item 2.3</span>
<ul>
<li>Item 2.3.1</li>
<li>Item 2.3.2</li>
<li>Item 2.3.3</li>
<li>Item 2.3.4</li>
<li>Item 2.3.5</li>
<li>Item 2.3.6</li>
<li>Item 2.3.7</li>
<li>Item 2.3.8</li>
<li>Item 2.3.9</li>
</ul>
</li>
<li>
<span>Item 2.4</span>
<ul>
<li>Item 2.4.1</li>
<li>Item 2.4.2</li>
<li>Item 2.4.3</li>
<li>Item 2.4.4</li>
<li>Item 2.4.5</li>
<li>Item 2.4.6</li>
<li>Item 2.4.7</li>
<li>Item 2.4.8</li>
<li>Item 2.4.9</li>
</ul>
</li>
</ul>
</li>
<li>Item 3</li>
</ul>
</div>
<script src="http://www.jq22.com/js/jq.js"></script>
</body></html>根据树形菜单实现动态div链接实例，关于实现树形菜单请参照上文内容。
<script type="text/javascript">
$(function(){
$("#li1").click(function(){
$("#div1").load("save.jsp");
});
$("#li2").click(function(){
$("#div2").load("save.jsp");
});
});
</script>
<body>
<div>
<ul id="browser" class="filetree">
<li ><span class="folder"><a href="">NO</a></span>
<ul>
<li id="li1"><span class="file"><a href="#">1</a></span></li>
<li id="li2"><span class="file"><a href="#">2</a></span></li>
</ul>
</li>
</ul>
</div>
<div id="div1">
div1
</div>
<div id="div2">
div2
</div>
</body>