How do you get the footer to stay at the bottom of a Web page?

To get a sticky footer:

1. Have a <div> with class="wrapper" for your content.

2. Right before the closing </div> of the wrapper place the
   <div class="push"></div>.

3. Right after the closing </div> of the wrapper place the
   <div class="footer"></div>.

* {
    margin: 0;
}
html, body {
    height: 100%;
}
.wrapper {
    min-height: 100%;
    height: auto !important;
    height: 100%;
    margin: 0 auto -142px; /* the bottom margin is the negative value of the footer's height */
}
.footer, .push {
    height: 142px; /* .push must be the same height as .footer */
}