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>
原文：https://www.cnblogs.com/bolin-123/p/9175711.html