效果图
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<script src="../jq/jquery.min.js"></script>
<script src="../jq/jquery.easyui.min.js"></script>
<link rel="stylesheet" href="../themes/default/easyui.css" />
<link rel="stylesheet" href="../themes/icon.css" />
<script src="../jq/easyui-lang-zh_CN.js"></script>
</head>
<body>
<div class="easyui-accordion" style="width:300px;height:200px;">
<div title="About Accordion" iconCls="icon-ok" style="overflow:auto;padding:10px;">
<h3 style="color:#0099FF;">Accordion for jQuery</h3>
<p>Accordion is a part of easyui framework for jQuery. It lets you define your accordion component on web page more easily.</p>
</div>
<div title="About easyui" iconCls="icon-reload" selected="true" style="padding:10px;">
easyui help you build your web page easily
</div>
<div title="Tree Menu">
<ul id="tt1" class="easyui-tree">
<li>
<span>Folder1</span>
<ul>
<li>
<span>Sub Folder 1</span>
<ul>
<li><span>File 11</span></li>
<li><span>File 12</span></li>
<li><span>File 13</span></li>
</ul>
</li>
<li><span>File 2</span></li>
<li><span>File 3</span></li>
</ul>
</li>
<li><span>File2</span></li>
</ul>
</div>
</div>
</body>
</html>