前端开发点击获取验证码倒计时

<input

    type=”button”

    class=”btn c-333 text-c js-code”

    value=”获取验证码”

    onclick=”settime(this);”

/>

<script type=”text/javascript” charset=”utf-8″>

    var countdown = 60

    function settime(obj) {

        if (countdown == 0) {

            obj.removeAttribute(‘disabled’)

            obj.value = ‘获取校验码’

            countdown = 60

            return

        } else {

            obj.setAttribute(‘disabled’, true)

            obj.value = ‘重新发送（’ + countdown + ‘s)’

            countdown–

        }

        setTimeout(function() {

            settime(obj)

        }, 1000)

    }

</script>