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<title>制作简单的树形菜单</title>
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if(document.getElementById("tietu").style.display=='block'){
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document.getElementById("tietu").style.display='block';
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if(document.getElementById("fangchan").style.display=='block'){
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<b><img src="All.gif"><font color="#009900">树形菜单：</font></b>
<a href="javascript:onclick=show() "><img src="http://images.cnblogs.com/cnblogs_com/caidupingblogs/773011/o_mbi_024.gif">文学艺术</a>
<ul id="art" class="no_circle">
<li><img src="http://images.cnblogs.com/cnblogs_com/caidupingblogs/773011/o_folder_open.gif">先锋写作</li>
<li> <img src="http://images.cnblogs.com/cnblogs_com/caidupingblogs/773011/o_folder_open.gif" >小说散文</li>
<li><img src="http://images.cnblogs.com/cnblogs_com/caidupingblogs/773011/o_folder_open.gif" >诗风词韵</li>
</ul>
<a href="javascript:onclick=show2() ">
<img src="http://images.cnblogs.com/cnblogs_com/caidupingblogs/773011/o_mbi_024.gif">贴图专区</a>
<ul id="tietu" class="no_circle">
<li><img src="http://images.cnblogs.com/cnblogs_com/caidupingblogs/773011/o_folder_open.gif">真我风采</li>
<li><img src="http://images.cnblogs.com/cnblogs_com/caidupingblogs/773011/o_folder_open.gif">视屏贴图</li>
<li><img src="http://images.cnblogs.com/cnblogs_com/caidupingblogs/773011/o_folder_open.gif">行行摄摄</li>
<li><img src="http://images.cnblogs.com/cnblogs_com/caidupingblogs/773011/o_folder_open.gif">Flash贴图</li>
</ul>
<a href="javascript:onclick=show3() ">
<img src="http://images.cnblogs.com/cnblogs_com/caidupingblogs/773011/o_mbi_024.gif">房产论坛</a>
<ul id="fangchan" class="no_circle">
<li><img src="http://images.cnblogs.com/cnblogs_com/caidupingblogs/773011/o_folder_open.gif">我要买房</li>
<li> <img src="http://images.cnblogs.com/cnblogs_com/caidupingblogs/773011/o_folder_open.gif">楼市话题</li>
<li><img src="http://images.cnblogs.com/cnblogs_com/caidupingblogs/773011/o_folder_open.gif">我要卖房</li>
<li><img src="http://images.cnblogs.com/cnblogs_com/caidupingblogs/773011/o_folder_open.gif">租房心语</li>
<li><img src="http://images.cnblogs.com/cnblogs_com/caidupingblogs/773011/o_folder_open.gif">二手市场</li>
</ul>
<a href="javascript:onclick=show4() ">
<img src="http://images.cnblogs.com/cnblogs_com/caidupingblogs/773011/o_mbi_024.gif">娱乐八卦</a>
<ul id="yule" class="no_circle">
<li><img src="http://images.cnblogs.com/cnblogs_com/caidupingblogs/773011/o_folder_open.gif">红楼一梦</li>
<li> <img src="http://images.cnblogs.com/cnblogs_com/caidupingblogs/773011/o_folder_open.gif">楼市话题</li>
<li><img src="http://images.cnblogs.com/cnblogs_com/caidupingblogs/773011/o_folder_open.gif">笑话论坛</li>
<li><img src="http://images.cnblogs.com/cnblogs_com/caidupingblogs/773011/o_folder_open.gif">休闲生活</li>
<li><img src="http://images.cnblogs.com/cnblogs_com/caidupingblogs/773011/o_folder_open.gif">大话春秋</li>
</ul>
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