Table row and CSS

HTML:

A	B	C
Cell #1	Cell #2	Cell #3
Cell #4	Cell #5	Cell #6
Cell #7	Cell #8	Cell #9

Demo : http://jsfiddle.net/pankaj7418/J3Qfq/5/

<table border="2" class="text_12">

<tr>

    <td>A</td>

    <td>B</td>

    <td>C</td>

</tr>

<tr>

    <td>Cell #1</td>

    <td>Cell #2</td>

    <td>Cell #3</td>

</tr>

<tr>

    <td>Cell #4</td>

    <td>Cell #5</td>

    <td>Cell #6</td>

</tr>

<tr>

    <td>Cell #7</td>

    <td>Cell #8</td>

    <td>Cell #9</td>

</tr>

</table>

CSS:

<style>

table.text_12 tr td:nth-child(2){

    background-color:red;

}

table.text_12 tr+tr td:nth-child(1){

    background-color:green;

}

</style>