基于CSS3动态背景登录框代码

<div class="htmleaf-container">
        <div class="wrapper">
            <div class="container">
                <h1>Welcome</h1>

                <form class="form">
                    <input type="text" placeholder="Username">
                    <input type="password" placeholder="Password">
                    <button type="submit" id="login-button">Login</button>
                </form>
            </div>

            <ul class="bg-bubbles">
                <li></li>
                <li></li>
                <li></li>
                <li></li>
                <li></li>
                <li></li>
                <li></li>
                <li></li>
                <li></li>
                <li></li>
            </ul>
        </div>
    </div>

    <script src="js/jquery-2.1.1.min.js" type="text/javascript"></script>
    <script>
        $(‘#login-button‘).click(function (event) {
            event.preventDefault();
            $(‘form‘).fadeOut(500);
            $(‘.wrapper‘).addClass(‘form-success‘);
        });
    </script>