html,
body {
    position: absolute;
    width: 100%;
    min-height: 100%;
    padding: 0;
    margin: 0;
}

body:after {
    line-height: 100px;
    /* height of footer */
    white-space: pre;
    content: "\A";
}

footer {
    position: absolute;
    width: 100%;
    height: 100px;
    /* height of footer */
    bottom: 0;
    /* height of footer */
    text-align: center;
    border: 0px #000 solid;
    vertical-align: middle;
}

footer p {
    text-align: center;
    margin-top: 40px;
}