<!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" xml:lang="en"><head> <meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> <title>Document</title> <style type="text/css"> *{margin:0; padding:0; font-size:13px; list-style:none; } p{height:25px; width:80px; line-height:25px; font-weight:bold; background:red; border-bottom:1px solid #ccc; padding-left:5px; } ul{ display:none; } li{height:24px; line-height:24px; padding-left:5px; } </style> <script type="text/javascript"> window.onload=function(){ var obj=document.getElementById('d1') var obj1=document.getElementsById('d2') </script></head><body> <div> <p id="d1">菜单a</p> <ul id="d2"> <li>a1</li> <li>a2</li> <li>a3</li> </ul> <p id="d1">菜单b</p> <ul id="d2"> <li>b1</li> <li>b2</li> <li>b3</li> </ul> </div></body></html>
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