规定每个 <td> 元素相关联的 <th> 元素 - 在线编辑器

          <table border="1">
  <tr>
    <th id="name">Name</th>
    <th id="email">Email</th>
    <th id="phone">Phone</th>
    <th id="addr">Address</th>
  </tr>
  <tr>
    <td headers="name">John Doe</td>
    <td headers="email">someone@example.com</td>
    <td headers="phone">+45342323</td>
    <td headers="addr">Rosevn 56,4300 Sandnes,Norway</td>
  </tr>
</table>
        