            padding: 1em;
                width: 2em;
                height: 2em;
            }
            td.cell5
            {
                border: 5px dashed blue;
            }
            td.cell6
            {
                border: 5px solid green;
            }
        </style>
    </head>
    <body>
        <table>
            <col id="col1" />
            <col id="col2" />
            <col id="col3" />
            <tr id="row1">
                <td> 1</td>
             