<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>jQuery</title>
<script src="jquery-3.3.1.min.js"></script>
</head>
<body>
<script type="text/javascript">
$(function(){
// 按钮单击时执行
$("#btnInfo").click(function() {
//$(".divInfo").hide();
alert($('input[name="sex"]:checked').val());
});
})
</script>
<div class="divInfo">
<input type="radio" name="sex" value="1" />男
<input type="radio" name="sex" value="2" />女
</div>
<button id="btnInfo" type="button">jQuery</button>
</body>
</html>