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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head>    <title>dtablecolumnclasses.jsp</title>    <style type="text/css">        .b1 {            background-color: red;        }        .b2 {            background-color: green;        }        .b3 {            background-color: blue;        }        .b4 {            background-color: burlywood;        }    </style>            </head><body><table><tbody><tr><td class="b1">c1</td><td class="b2">c2</td><td>c3</td></tr></tbody></table><table><tbody><tr><td class="b1">c1</td><td class="b2">c2</td><td class="b3">c3</td></tr></tbody></table></body></html>