Just apply the .beta class selector to the entire table and change your CSS code to apply a rule only to td decedents of .beta like this:
<table class="beta">
<tr>
<td>...</td>
<td>...</td>
</tr>
</table>
.beta td {
border-style:solid;
border-top:thick double #ff0000;
}
If you need to apply the rule to multiple elements within .beta simply add an additional selector like this:
.beta td,
.beta th {
border-style:solid;
border-top:thick double #ff0000;
}
Qapla’!