<table class="cal">
    <colgroup>
        <col span="7" width="33px"/>
    </colgroup>
    <tr>
        <td class="bel">&nbsp;</td>
        <td colspan="6">Belegt</td>
    </tr>
    <tr>
        <td class="hs">&nbsp;</td>
        <td colspan="6">Hauptsaison</td>
    </tr>
    <tr>
        <td class="ns">&nbsp;</td>
        <td colspan="6">Nebensaison</td>
    </tr>
    <tr>
        <td class="aw">&nbsp;</td>
        <td colspan="6">Weihnachten</td>
    </tr>
</table>