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>