Update to:
<table width="788" height="422" border="0" align="center" cellpadding="0" cellspacing="0" id="Table_01">
<tr border="0" class="top">
<td><img src="http://www.robertagavioli.it/wp-content/uploads/2013/04/header.png" alt="" width="788" height="231" /></td>
</tr>
<tr border="0" class="middle">
<td>< HERE I HAVE INSERTED WHAT DID YOU SEE THERE , form…ecc></td>
</tr>
<tr border="0" class="bottom">
<td><img src="http://www.robertagavioli.it/wp-content/uploads/2013/04/footer.png" alt="" width="788" height="98" /></td>
</tr>
</table>