Harry Roberts with a nice technique on using pseudo elements to create the body border effect without extraneous markup (same idea with extra markup gets you older browser support). Read the comments for some other good suggestions.
A border that goes all the way around the browser window and stays there when you scroll. In this article we cover a few different techniques to get it done, from the deepest browser support to the most progressive.
A good-looking tab control usually has one feature that I've always found impossible to reproduce without images: borders that bend to the outside at the bottom of each tab. In this article I would like to show how you can use the CSS :before and :after pseudo elements to create this effect without using images.