css:
Cita: .link{
width:100px;
height:100px;
}
.link a{
display:block;
height:100px;
background-color:#C0C0C0;
}
.link a:hover{background-color:#E0E0E0;}
html
Código HTML:
<table>
<tr>
<td class="link" ><a href="#">td1</a></td>
<td>td12</td>
</tr>
<tr>
<td>td3</td>
<td>td4</td>
</tr>
</table>