scusate, nn vi ho messo il codice completo:

<table cellpadding="0" cellspacing="0" background="immagini/sfondo.jpg" border="0" width="765" height="301">
<tr>
<td>
<table height="100%" width="100%" cellpadding="0" cellspacing="0" border="1">
<tr>
<td>
<table cellpadding="0" cellspacing="0" border="1">
<tr><td>a</td></tr>
<tr><td>a</td></tr>
<tr><td>a</td></tr>
<tr><td>a</td></tr>
<tr><td>a</td></tr>
<tr><td>a</td></tr>
<tr><td>a</td></tr>
<tr><td>a</td></tr>
<tr><td>a</td></tr>
<tr><td>a</td></tr>
<tr><td>a</td></tr>
<tr><td>a</td></tr>
<tr><td>a</td></tr>
<tr><td>a</td></tr>
<tr><td>a</td></tr>
<tr><td>a</td></tr>
<tr><td>a</td></tr>
<tr><td>a</td></tr>
<tr><td>a</td></tr>
<tr><td>a</td></tr>
<tr><td>a</td></tr>
</table>
</td>
<td>corpo dell'home page</td>
</tr>
</table>
</td>
</tr>
</table>

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grazie di nuovo