(Hover over the box.)
Before we do, let's take a moment to appreciate where we come from.
You see, to create any part of these sites
at the time, we needed a lot of images.
Even just for a fancy box like this,
we'd have to create a div with 9 children elements,
and make custom images for each of the corners and sides,
repeating them as needed, to create the illusion of a single box.