Js 竖直伸缩菜单(百度)

<title>从百度扒下来的竖直伸缩菜单-</title>
<div class="menu" id="MenuContainer">
<h4 nodeid="390">新手入门</h4>
<div style="display:none" id="submenu_390">
<p><a href="#">关于百度搜索推广</a></p>
<p><a href="#">账户注册</a></p>
<p><a href="#5">快速上手</a></p>
</div>

<h4 nodeid="397">推广制作</h4>
<div style="display:none" id="submenu_397">
<p><a href="#">设置匹配方式</a></p>
<p><a href="#">撰写创意</a></p>
<p><a href="#">设置URL</a></p>
</div>

<h4 nodeid="436">推广投放</h4>
<div style="display:none" id="submenu_436">
<p><a href="#">点击过滤</a></p>
<p><a href="#">质量度</a></p>
<p><a href="#">关键词匹配</a></p>
<p><a href="#">创意展现方式</a></p>
</div>

<h4 nodeid="506">效果评估</h4>
<div style="display:none" id="submenu_506">
<p><a href="#">推广效果</a></p>
<p><a href="#6">百度Bridge</a></p>
</div>

<h4 nodeid="515">持续优化</h4>
<div style="display:none" id="submenu_515">
<p><a href="#">网站优化</a></p>
</div>

<h4 nodeid="520">增值产品</h4>
<div style="display:none" id="submenu_520">
<p><a href="#1">百度推广助手</a></p>
<p><a href="#">营销中心</a></p>
</div>

<h4 class="expand" nodeid="3936">关注焦点</h4>
<div style="display:none" id="submenu_3936">
<p><a href="#7">推广专题</a></p>
</div>

</div>
<script type="text/javascript">
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