Edit in JSFiddle

HTML
CSS
Result

<body>
    <div class="wrapper">
        <header class="myHeader">
            HEADER
        </header>
        <section class="content">This is the body</section>
        <footer class="myFooter">Footer</footer>
    </div>
</body>

html, body {
    height: 100%;
    min-height: 100%;
    margin: 0px;
    border: 0px;
    padding: 0px;
    outline: 0px;
}

body {
    position: relative;
    overflow: hidden;
}

header {
    text-align: center;
    padding: 20px 0px;
    background-color: #C8C8C8;
    vertical-align: middle;
}

.wrapper {
    min-height: 100%;
    position: relative;
}

.content {
    height: 100%;
    min-height: 100%;
    padding-bottom: 75px;
}

footer {
    height: 75px;
    text-align: center;
    position: absolute;
    bottom: 0px;
    background-color: #DC3522;
    width: 100%;
    color: white;
}