<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
body{height: 100%;}
html{height: 100%;}
.m-container{position: relative;min-height: 100%;height: auto !important;height: 100%;background-color: red;width: 100%;}
.header{width: 100%;height: 20px;background-color: #000;}
.main{padding-bottom: 140px;width: 100%;}
.footer{position: absolute;bottom: 0;background-color: #ccc;width: 100%;height: 140px;}
</style>
</head>
<body>
<div class="m-container">
<div class="header"></div>
<div class="main"></div>
<div class="footer"></div>
</div>
</body>
</html>
