jQuery实现发送短信验证码后60秒倒计时

时间：2022-03-19 09:50:18
<!DOCTYPE html>

<html>

<head>

<meta charset="utf-8">

<script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js"></script>

<script type="text/javascript">

var countdown=60;

function sendemail(){

    var obj = $("#btn");

    settime(obj);

    }

function settime(obj) { //发送验证码倒计时

    if (countdown == 0) {

        obj.attr('disabled',false);

        //obj.removeattr("disabled");

        obj.val("免费获取验证码");

        countdown = 60;

        return;

    } else {

        obj.attr('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="sendemail()" /> 

</body>

</html>

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