话不多说，上代码
* {
margin: 0;
}
html, body {
height: 100%;
}
.wrapper {
height: 100%;
margin: 0 auto -4em;
}
.footer, .push {
height: 4em;
}
<div class="wrapper">
<p>Your website content here.</p>
</div>
<div class="footer">
<p>Copyright (c) 2008</p>
</div>
