px;" id="hideable" />
        </colgroup>
        <tr>
            <td>100</td>
            <td>200</td>
            <td>300</td>
        </tr>
    </table>

    <table id="two" style="border: 1px solid orange">
        <colgroup>
            <col style="width: 100px; display: none;" id="displayable" />
            <col style="width: 200px;" />
            <col style="width: auto;" />
        </colgroup>
        <tr>
            <td>100</td>
            <td>200</td>
            <td>300</td>
        </tr>
  