A bit of technology

If you are a web-developer then you definitely should know about CSS sprites. This thingie is quite old and highly used by experienced web-developers. I used this trick for the first time somewhere back in 2003-2004 when developing JavaScript game prototype for my own pleasure. No one knew the term those days, but some people already used CSS sprites in some projects, because they, like me, had a PC gaming background. And then many web-devs realized that CSS sprites do really increase application performance, so they started to write frameworks and helpful libraries to support "new" technology.

Oh, nostalgy...

Anyway, if you are not yet familiar with the topic, then do not hesitate to visit Smashing Magazine and read everything you need to know about CSS sprites!