<html>
<body>
<div class="con">
<footer></footer>
</div>
</body>
</html>
html,body{
height:100%
}
.con{
min-height:100%;
position:relative;
padding-bottom:120px;
}
footer{
width:100%;
height:100px;
position:absolute;
left:0;
bottom:0;
}