带有预定义宽度的表头单元 - 在线编辑器

          <table border="1" width="100%">
  <tr>
    <th width="70%">Month</th>
    <th width="30%">Savings</th>
  </tr>
  <tr>
    <td>January</td>
    <td>$100</td>
  </tr>
  <tr>
    <td>February</td>
    <td>$80</td>
  </tr>
</table>
        