日期:2014-05-16 浏览次数:20457 次
<!DOCTYPE HTML>
<html>
<head>
<meta charset="gb2312" />
<title></title>
<style>
</style>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.1/jquery.min.js"></script>
</head>
<body>
<div id="a">
<span>
1
<span>
2
<span>3</span>
</span>
</span>
</div>
<div id="b">
<span>
1
<span>
2
<span>3</span>
</span>
</span>
</div>
<script>
alert( $('#a').children('span').length ) //1
alert( $('#a').find('span').length ) //3
</script>
</body>
</html>