<!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 src="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>js短信倒计时
原文地址：http://827403645.blog.51cto.com/11177953/1972759