nao esqueça de fechar </html>
</body>
<style type="text/css">
<!--
.table1 { color:black; background-color: #00ff00; }
.table2 { color:gold; background-color: #cccccc; }
//-->
</style>
</head>
<body>
<table border="1">
<tr>
<td class="table1" onmouseover="this.className='table2';" onmouseout="this.className='table1';">Link1</td>
</tr>
<tr>
<td class="table1" onmouseover="this.className='table2';" onmouseout="this.className='table1';">Link2</td>
</tr>
<tr>
<td class="table1" onmouseover="this.className='table2';" onmouseout="this.className='table1';">Link3</td>
</tr>
</table>
</body>