验证码效果 

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>Document</title>
</head>
<style>
    #getCode {
        width: 9rem;
        height: 3rem;
        line-height: 3rem;
        font-size: 1.2rem;
        background-color: #3a3a3a;
        color: #fff;
        border-radius: 0.8rem;
        border: none;
        text-align: center;
    }

    #getCode[disabled] {
        background-color: #B6B6B6;
    }
</style>

<body>
<button id="getCode" class="disabled">获取验证码</button>
</body>
<script>
    window.onload = function () {

        //获取验证码
        var getCode = document.getElementById('getCode');
        var wait = 60;

        function time(btn) {
            if (wait === 0) {
                btn.disabled=false;
                btn.innerHTML = "获取验证码";
                wait = 60;
            } else {
                btn.disabled=true;
                btn.innerHTML = wait + "秒后重试";
                wait--;
                setTimeout(function() {
                    time(btn);
                }, 1000);
            }
        }
        getCode.onclick = function() {
            time(this);
        };
    }
</script>

</html>

 

posted @ 2017-10-09 15:56  BluesQian  阅读(128)  评论(0)    收藏  举报