I have a table
<table>
<tr>
<td class="tableheading">Heading 1</td>
</tr>
<tr>
<td>Text 1</td>
<td>Text 2</td>
</tr>
<tr>
<td class="tableheading">Heading 2</td>
</tr>
<tr>
<td>Text 3</td>
<td>Text 4</td>
</tr>
</table>
and I want the
<td class="tableheading">
to fill up the same space as the two td's below.
How would I achieve this?