<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>jQuery</title>
<script src="../js/jquery.js"></script>
<script>
$(function(){
$('#btn1').click(function(){
alert("你选择的是："+$('input[type = radio]:checked').val());
});
});
</script>
</head>
<body>
<p>请选择你喜欢的水果：</p>
<input type="radio" name="fruit" value="苹果">苹果
<input type="radio" name="fruit" value="香蕉">香蕉
<input type="radio" name="fruit" value="桔子">桔子
<br>
<button id="btn1">提交</button>
</body>
</html>
效果图：
