获取手机验证码倒计时
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>获取验证码</title>
<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" />
</head>
<body>
<input type="button" id="btn" value="获取验证码" />
<script type="text/javascript">
var wait = 60;
function time(o) {
if(wait == 0) { o.removeAttribute("disabled"); o.value = "重新获取验证码"; wait = 60; } else { o.setAttribute("disabled", true); o.value = "重新发送(" + wait + ")"; wait--; setTimeout(function() { time(o) },1000); } } document.getElementById("btn").onclick = function() { time(this); } </script> </body> </html>