现在是点击看不清就会刷新当前页面，怎么用异步刷新实现点击看不清就更新验证码呢，求指教
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8" %>
<html>
<head>
<script src="/res/js/jquery-3.6.0.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("#refresh_a").click(function(){
let url = '${pageContext.request.contextPath}/user/image';
$('#captchaImage').attr('src',url);
});
})
</script>
</head>
<body>
验证码练习
<form id="login_form" >
验证码：<input id="verifyId" type="text" name="verify_code" value=""/>
<img src="${pageContext.request.contextPath}/user/image" width="119" height="34" class="code" id="captchaImage"/>
<a href="" id="refresh_a">看不清，换一个</a>
<%-- <input type="button" id="tijiao_btn" value="提交"/>--%>
</form>
