使用jQuery为第二列表添加类

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;
}

现场: http ://jsfiddle.net/zCduV/1/

如何在此表中为第二列添加带有jQuery的类.red(在此示例中,这是td中ccc的位置)？

Answer 1

这可能呢？

// 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

通过使用jQuery nth-child选择器:

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

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