1.html代码
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript" src="/jquery/jquery.js"></script>
</head> <body>
<ul>
<li>list item 1</li>
<li>list item 2</li>
<li class="third-item">list item 3</li>
<li>list item 5</li>
<li>list item 4</li>
</ul> <script>
$('li.third-item').next().css('background-color', 'red');
</script> </body>
</html>
2.效果
