please help me with knockout.js code

I try select element in table by id and change it's css style, but all rows have same id and I can't using function getElementById. How I can do this simple thing ?

```
<tbody data-bind="foreach: times">
        <tr>
            <td id=$index() data-bind="click: $root.select.bind($data, $index(), 0)> </td>

        ....

        <td id=$index() data-bind="click: $root.select.bind($data, $index(), 19)> </td>

    <tr>
</tbody>

```