​x
 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<style type="text/css">
table
  {
  border-collapse:collapse;
  }
​
table, td, th
  {
  border:1px solid black;
  }
</style>
</head>
​
<body>
<table>
<tr>
<th>Firstname</th>
<th>Lastname</th>
</tr>
<tr>
<td>Bill</td>
<td>Gates</td>
</tr>
<tr>
<td>Steven</td>
<td>Jobs</td>
</tr>
</table>
<p><b>注释：</b>如果没有规定 !DOCTYPE，border-collapse 属性可能会引起意想不到的错误。</p>
</body>
</html>
​