提取单选框的值，并通过ajax传值到后台

<!DOCTYPE html>
<html lang="zh" xmlns:th="http://www.thymeleaf.org" xmlns:shiro="http://www.pollix.at/thymeleaf/shiro">
<head><th:block th:include="include :: header('日库存更新提示')" />
</head>
<style>.danxuankuang{margin-left: 20px;}
</style>
<body class="gray-bg">
<div class="container-div"><div class="danxuankuang"><input style="margin-top: 0.8em;" type="radio" id="option1" name="group1"  value="allOilTank"><label for="option1">a</label></div><div class="danxuankuang"><input style="margin-top: 0.8em;" class="tubiao" type="radio" id="option2" name="group1" value="oneOilTank"><label for="option2">b</label></div><div class="danxuankuang"><input style="margin-top: 0.8em;" class="tubiao" type="radio" id="option3" name="group1" value="twoOilTank"><label for="option3">c</label></div><div class="danxuankuang"><input style="margin-top: 0.8em;" class="tubiao" type="radio" id="option4" name="group1" value="threeOilTank"><label for="option3">d</label></div></div>
<th:block th:include="include :: footer" />
<script th:inline="javascript">function submitHandler() {update()}function update() {//单选框的值var val=$('input:radio[name="group1"]:checked').val();// console.log(val)$.ajax({cache : true,type : "POST",url : ctx+'/ab/timePointInventory/'+val,data : val,async : false,error : function(request) {// console.log(request)$.modal.alertError("系统错误");},success : function(data) {// console.log(data)$.operate.successCallback(data);}});}
</script>
</body>
</html>