不会是下面这样的效果吧!<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>mm</title>
<style type="text/css">
<!--
td {
border-top-width: 0px;
border-right-width: 0px;
border-bottom-width: 1px;
border-left-width: 0px;
border-top-style: none;
border-right-style: none;
border-bottom-style: dotted;
border-left-style: none;
height: 30px;
}
-->
</style>
</head><body>
<table width="774" border="0" cellspacing="0" cellpadding="0">
  <tr>
    <td>你看看</td>
  </tr>
  <tr>
    <td>你再看看</td>
  </tr>
</table>
</body>
</html>