An Example:
<table border="1" cellpadding="0" cellspacing="0" style="border-collapse: collapse" bordercolor="#111111" width="75%" id="AutoNumber1">
<tr>
<td width="33%">A</td>
<td width="33%">B</td>
<td width="34%">C</td>
</tr>
<tr>
<td width="33%">1</td>
<td width="33%">2</td>
<td width="34%">3</td>
</tr>
</table>
I am sure you could incorporate Excel directly in html