st passes if there is no red visible on the page.</p>
        <table>
            <tr>
                <td>double</td>
                <td id="cell1">double</td>
                <td>double</td>
            </tr>
            <tr>
                <td id="cell2">double</td>
                <td id="cell3">hidden</td>
                <td id="cell4">double</td>
            </tr>
            <tr>
                <td>double</td>
                <td id="cell5">double</td>
                <td>double</t