At work, I do a little bit of web design because there is a web interface to our product. Customers buy a computer from us that comes with Apache and a website for accessing our product remotely.
I wanted to improve the site by making footers stick to the bottom of the browser window when the browser window is taller than needed for the page content.
Thanks to ryanfait.com for providing this.
Here is a picture of an old page:
And the new footer stuck to the bottom of the browser window: