有一个需求：菜单导航条需要依据不同的权限动态提取出来。计划是将功能模块与用户权限之间的关系保持到一个配置表中。所以功能菜单的话就需要动态提取出来再显示。借助jquery框架实现一段动态菜单显示的方案。
一、学习一款它的插件TreeView
这个插件能够把无序列表转换成可展开与收缩的Tree。
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<script src="http://code.jquery.com/jquery-latest.js"></script>
<link rel="stylesheet" href="screen.css" type="text/css" />
<link rel="stylesheet" href="jquery.treeview.css" type="text/css" />
<script type="text/JavaScript" src="jquery.treeview.js"></script>
<script>
$(document).ready(function(){
$("#example").treeview();
});
</script>
</head>
<body>
<ul id="example" 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>
<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>
</body>
</html>
