:odd Selector
odd selector
version added: 1.0jQuery(':odd')
描述： 選擇奇數(shù)元素，從 0 開始計數(shù)。同樣查看偶數(shù)
特別地注意的是，這是基于0的索引，所以:odd選擇器是選擇第二個元素，第四個元素，依此類推在匹配。
Example:
Finds odd table rows, matching the second, fourth and so on (index 1, 3, 5 etc.).
<!DOCTYPE html>
<html>
<head>
<style>
table {
background:#f3f7f5;
}
</style>
<script src="http://code.jquery.com/jquery-latest.min.js"></script>
</head>
<body>
<table border="1">
<tr><td>Row with Index #0</td></tr>
<tr><td>Row with Index #1</td></tr>
<tr><td>Row with Index #2</td></tr>
<tr><td>Row with Index #3</td></tr>
</table>
<script>$("tr:odd").css("background-color", "#bbbbff");</script>
</body>
</html>