JQuery 实现点击按钮后倒计时效果，多用于实现发送手机验证码
2016-11-29 本文已影响28人
Junting
<!DOCTYPE html>
<html>
<head>
<script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js"></script>
<script type="text/javascript">
var countdown=60;
function settime(obj) {
if (countdown == 0) {
obj.removeAttr("disabled");
obj.val("免费获取验证码");
countdown = 60;
return;
} else {
obj.setAttr("disabled", true);
obj.val("重新发送(" + countdown + ")");
countdown--;
}
setTimeout(function() {
settime(obj) }
,1000)
}
</script>
<body>
<input type="button" id="btn" value="免费获取验证码" onclick="settime(this)" />
</body>
</html>
