常见的做法是利用 CSS2 的 "border-collapse:collapse;" 属性合并表格边框；并对 table 元素设置左边框和上边框，对 th 和 td 元素设置右边框和下边框。
<table>
<tr>
<th>table head (row1, col1)</th>
<th>table head (row1, col2)</th>
<th>table head (row1, col3)</th>
</tr>
<tr>
<td>table data (row1, col1)</td>
<td>table data (row1, col2)</td>
<td>table data (row1, col3)</td>
</tr>
<tr>
<td>table data (row2, col1)</td>
<td>table data (row2, col2)</td>
<td>table data (row2, col3)</td>
</tr>
</table>