描述:鼠標懸停列標題,改變該列的背景色
HTML:
<table border="1">
<thead>
<tr>
<th>姓名</th>
<th>年齡</th>
<th>性別</th>
</tr>
</thead>
<tbody>
<tr>
<td>小文</td>
<td>20</td>
<td>男</td>
</tr>
<tr>
<td>小李</td>
<td>21</td>
<td>男</td>
</tr>
<tr>
<td>小慧</td>
<td>21</td>
<td>女</td>
</tr>
<tr>
<td></td>
<td>19</td>
<td>女</td>
</tr>
<tr>
<td>小勇</td>
<td>22</td>
<td>男</td>
</tr>
<tr>
<td>馨兒</td>
<td>23</td>
<td>女</td>
</tr>
<tr>
<td>小鵬</td>
<td>21</td>
<td>男</td>
</tr>
<tr>
<td>鴨梨山大</td>
<td>30</td>
<td>男</td>
</tr>
</tbody>
</table>
CSS:
.hover{
background-color: #00f;
color: #fff;
}
jquery:
$('th').hover(function(){
// 獲取當前th的索引值
var col_index = $(this).index();
// alert(col_index);
//nth-child的參數值從1開始,故索引值加1
$('tbody td:nth-child('+(col_index+1)+')').addClass('hover');
}, function(){
// 移出所有tr子元素的樣式
$('tbody tr').children().removeClass('hover');
});
截圖:

知識點:
1,index(),詳見手冊
2,nth-child(index/even/odd/equation),具體詳見手冊