原型图
需求：手机号验证
发送验证码之后开始60S倒计时
60s以后如果没有填写验证码，可重新发送
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>注册</title>
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no">
<meta name="format-detection" content="telephone=no">
<meta name="renderer" content="webkit">
<meta http-equiv="Cache-Control" content="no-siteapp" />
<script src="/UploadFiles/2021-04-02/jquery-latest.js">