Codice PHP:
<body>
<?php
if ($_GET['tabella'] == 1)
{
?>
    <table width="200" border="0">
        <tr>
            <td>Tabella 1</td>
        </tr>
    </table>
<?php
}
else if ($_GET['tabella'] == 2)
{
?>
    <table width="200" border="0">
        <tr>
            <td>Tabella 2</td>
        </tr>
    </table>
<?php
}
?>
</body>