uped into table row groups." />
        <style type="text/css">* { margin: 0; padding: 0 }
            table
            {
                border: 1px solid black;
            }
            #tb1
            {
                background: blue;
            }
            #tb2
            {
                background: purple;
            }
            td
            {
                height: 2em;
                width: 2em;
            }
        </style>
    </head>
    <body>
        <p>T