firefox下rowspan+border+border-collapse的bug_经验交流

后查具体情况概述为：firefox+table rowspan+border+border-collapse:collapse;
表现情况是：第一行与最后一行正常，其余的中间行，全部都与预期的border不同。
先看示例吧：

<title>Rank's HTML document</title> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"> <meta http-equiv="Pragma" content="no-cache"> <meta http-equiv="Cache-Control" content="no-cache"> <meta http-equiv="Expires" content="0"> <meta http-equiv="ImageToolbar" content="no"> <meta http-equiv="Creator.name" content="rank"> <style type="text/css" title="default" media="screen"></style> <style> * {font-size:15px;text-decoration:none;} td {border-top:1px solid #000} </style> <table width="50%" border="0" style="border:1px solid #000;border-collapse:collapse;width:100%;"> <tr> <th width="49%">绗</th> </tr> </table>