利用JQuery一句代码实现统计点击复选框个数
<html>
<head>
<meta charset="utf-8"/>
<script type="text/javascript" src="./script/jquery-1.4.2.min.js"></script>
<script>
$(document).ready(function(){alert($("input[name='n']:checked").length);}); //Jquery代码
</script>
</head>
<body>
<input type="checkbox" name="n" >
<input type="checkbox" name="n" >
<input type="checkbox" name="n" >
<input type="checkbox" name="n" >
<input type="checkbox" name="n" >
</body>
<html>