 to row groups (through the use of tbody elements)." />
        <style type="text/css">* { margin: 0; padding: 0 }
            table
            {
                border-collapse: collapse;
            }
            tbody
            {
                border: 3px solid black;
            }
            td
            {
                height: 2em;
                width: 2em;
            }
        </style>
    </head>
    <body>
        <p>Test passes if the box is divided into a top and bot