Fixed footer

body{
margin:0;
padding:0 0 0;
}
div#footer{
position:absolute;
bottom:0;
left:0;
width:100%;
height:;
}
@media screen{
body>div#footer{
position: fixed;
}
}
* html body{
overflow:hidden;
}
* html div#content{
height:100%;
overflow:auto;
}

footer
content

da: http://limpid.nl/lab/css/fixed/footer

fonte: www.sastgroup.com