Add class with jQuery for second columns of table

Question

<table>
    <tr><td>aaa</td><td>ccc</td><td>aaa</td><td>aaa</td><td>bbb</td><td>aaa</td><td>aaa</td></tr>
    <tr><td>aaa</td><td>ccc</td><td>aaa</td><td>aaa</td><td>bbb</td><td>aaa</td><td>aaa</td></tr>
    <tr><td>aaa</td><td>ccc</td><td>aaa</td><td>aaa</td><td>bbb</td><td>aaa</td><td>aaa</td></tr>
    <tr><td>aaa</td><td>ccc</td><td>aaa</td><td>aaa</td><td>bbb</td><td>aaa</td><td>aaa</td></tr>
    <tr><td>aaa</td><td>ccc</td><td>aaa</td><td>aaa</td><td>bbb</td><td>aaa</td><td>aaa</td></tr>
</table>

table td {
    background-color: green;
    padding: 5px;
    border: 1px solid blue;
}

.red {
   background-color: red;
}

LIVE: http://jsfiddle.net/zCduV/1/

How can i add class .red with jQuery for second column in this table (in this example this is there where in td is ccc)?

Answer 1

This maybe?

// selects both table header and table data cells from the second column of the table
$('table th:nth-child(2), table td:nth-child(2)').addClass('red');

http://jsfiddle.net/tdTkQ/

Answer 2

By using the jQuery nth-child selector:

$('td:nth-child(2)').addClass('red');

Reference: http://api.jquery.com/nth-child-selector/

Answer 3

$('td:nth-child(2)').addClass('red');