  </x-td>
        </x-tr>
        <x-tr>
            <x-td>
                <span>row 2</span>
            </x-td>
            <x-td>
                <span></span>
            </x-td>
        </x-tr>
    </x-table>
    Bottom table is identical to top except row 1 has been collapsed.
    <x-table id="two">
        <x-tr id="collapse">
            <x-td>
                <img src="../support/cat.png">
            </x-td>
            <x-td>
                <span></span><span></span>
            </x-td>
       