居中对齐 <tfoot> 元素中的内容 - 在线编辑器

<table border="1" width="100%">

  <tr>

    <th>Month</th>
    <th>Savings</th>

  </tr>
  <tr>
    <td>January</td>

    <td>$100</td>
  </tr>
  <tr>
    <td>February</td>
    <td>$80</td>

  </tr>

  <tfoot align="center">
    <tr>
      <td>Sum</td>
      <td>$180</td>
    </tr>
  </tfoot>
</table>
​x
 
<table border="1" width="100%">
​
  <tr>
​
    <th>Month</th>
    <th>Savings</th>
​
  </tr>
  <tr>
    <td>January</td>
​
    <td>$100</td>
  </tr>
  <tr>
    <td>February</td>
    <td>$80</td>
​
  </tr>
​
  <tfoot align="center">
    <tr>
      <td>Sum</td>
      <td>$180</td>
    </tr>
  </tfoot>
</table>