<html>
<head>
<script type="text/javascript" src="http://www.w3school.com.cn/jquery/jquery.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$(":button").click(function(){
alert("radio有"+$(":radio").length);
alert("选中的radio有"+$(":radio:checked").length);
alert("选a的有"+$("[value='a']").filter(":checked").length);
alert("选b的有"+$("[value='b']").filter(":checked").length);
});
});
</script>
</head>
<body>
a<input type="radio" name="v1" value="a" />
b<input type="radio" name="v1" value="b" />
<br />
a<input type="radio" name="v2" value="a" />
b<input type="radio" name="v2" value="b" />
<br />
a<input type="radio" name="v3" value="a" />
b<input type="radio" name="v3" value="b" />
<br />
a<input type="radio" name="v4" value="a" />
b<input type="radio" name="v4" value="b" />
<br />
a<input type="radio" name="v5" value="a" />
b<input type="radio" name="v5" value="b" />
<br />
<input type="button" name="btn1" value="确定" />
</body>
</html>
测试上面代码。或是直接下载编辑好的htm文件
