<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <title>oec2003</title> <script language="JavaScript" type="text/JavaScript"> <!-- function toggle(targetid){ if (document.getElementById){ target=document.getElementById(targetid); if (target.style.display=="block"){ target.style.display="none"; } else { target.style.display="block"; } } } --> </script> <style type="text/css"> <!-- #div1{ background-color:#000000; height:400px; width:400px; display:none; } --> </style> </head> <body> <input type="button" id="butn" value="显示/隐藏" οnclick="toggle('div1')" /> <center> <div id="div1"></div></center> 居中的DIV </body> </html>
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