jQuery 验证被选中的复选框个数jquery
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<head>
<me...
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<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>jQuery 验证被选中的复选框个数</title>
<script language="javascript" src="jquery-1.7.1.min.js"></script>
</head>
<body>
<form action="" name="frm1" id="frm1" method="post">
<input type="checkbox" name="id" value="1" /><br />
<input type="checkbox" name="id" value="2" /><br />
<input type="checkbox" name="id" value="3" /><br />
<input type="button" value="提交" id="btn" />
</form>
<script type="text/javascript">
$("#btn").click(function(){
alert($("input[name='id']:checked").length);
})
</script>
</body>
</html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>jQuery 验证被选中的复选框个数</title>
<script language="javascript" src="jquery-1.7.1.min.js"></script>
</head>
<body>
<form action="" name="frm1" id="frm1" method="post">
<input type="checkbox" name="id" value="1" /><br />
<input type="checkbox" name="id" value="2" /><br />
<input type="checkbox" name="id" value="3" /><br />
<input type="button" value="提交" id="btn" />
</form>
<script type="text/javascript">
$("#btn").click(function(){
alert($("input[name='id']:checked").length);
})
</script>
</body>
</html>
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