<!DOCTYPE html><html lang="en"><head>    <meta charset="UTF-8">    <title>Document</title></head><style>#getCode {    width: 9rem;    height: 3rem;    line-height: 3rem;    font-size: 1.2rem;    background-color: #3a3a3a;    color: #fff;    border-radius: 0.8rem;    border: none;    text-align: center;}#getCode[disabled] {    background-color: #B6B6B6;}</style><body>    <button id="getCode">获取验证码</button></body><script class="lazyload" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB/AAffA0nNPuCLAAAAAElFTkSuQmCC" data-original="https://cdn.bootcss.com/jquery/1.7.2/jquery.min.js"></script><script>$(function() {    //获取验证码    var getCode = document.getElementById('getCode');    var wait = 60;    function time(btn) {        if (wait === 0) {            btn.removeAttribute("disabled");            btn.innerHTML = "获取验证码";            wait = 60;        } else {            btn.setAttribute("disabled", true);            btn.innerHTML = wait + "秒后重试";            wait--;            setTimeout(function() {                time(btn);            }, 1000);        }    }    getCode.onclick = function() {        time(this);    };})</script></html>