移动端点击获取验证码教程

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代码片段 1

<!DOCTYPE html>
<html lang=”en”>
<head>
    <meta charset=”UTF-8″>
    <title>前端开发行业发展ppt模板:验证码点击倒计时</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }
        .main {
            margin: 100px auto;
            width: 400px;
            height: 300px;
        }
        .main .text input {
            width: 200px;
            height: 40px;
            line-height: 40px;
            border: 1px solid #dddddd;
            float: left;
            padding-left: 10px;
            margin-right: 10px;
            font-size: 14px;
            outline: none;
        }
        .main .btn {
            width: 150px;
            height: 40px;
            line-height: 40px;
            background: #3cf;
            text-align: center;
            display: inline-block;
            color: white;
            text-decoration: none;
        }
        .main .gray {
            background: #dddddd;
            color: block;
        }
    </style>
    <script type=”text/javascript” src=”http://code.jquery.com/jquery-1.11.2.js”></script>
    <script type=”text/javascript”>
        $(function () {
            $(document).on(‘click’, ‘.btn’, function (e) { // 绑定事件给document元素绑定on事件,然后找要点击的class
                if ($(e.target).hasClass(‘gray’)) {
                    return false;
                } else {
                    time($(this));
                }
            })
            var i = 30; // 倒计时时间
            function time(t) {
                if (i == 0) {
                    t.removeClass(‘gray’);
                    t.html(‘免费获取验证码’);
                    i = 30; // 与声明的倒计时时间相同
                    t.bind(‘click’); // 时间结束后,再次绑定click事件
                } else {
                    t.html(‘<span>’ + i + ‘</span>’ + ‘秒后重新发送’); // 显示的倒计时
                    t.addClass(‘gray’);
                    t.unbind(‘click’); // 取消click事件
                    i–;
                    setTimeout(function () {
                        time(t);
                    }, 1000);
                }
            }
        })
    </script>
</head>
<body>
    <div class=”main”>
        <div class=”text”>
            <input type=”text” placeholder=”请输入验证码”>
        </div>
        <a href=”javascript:;” class=”btn”>免费获取验证码</a>
    </div>
</body>
</html>

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