<!DOCTYPE html>
<html>
  <body>
    <table style="border-collapse: collapse">
      <tr style="display: block; border: 5px solid">
        <td>LongLongLong</td>
      </tr>
      <tr style="border: 5px solid" id="t">
        <td>Short</td>
      </tr>
    </table>
  </body>
</html>