Wallpaper/Backgrounds within posts?

[curiousnathan]

I have noticed that some people are posting threads or just 'posting' in general and have included a wallpaper as I like to call it to their posts. I was wondering how I can do this, or is it only exclusive to supporters and above. Here is an example of Forever's Photography thread with the 'wallpaper' included. http://www.pokecommunity.com/showthread.php?t=233242

Yes Forever, I am helping you to promote your thread Lol. XD; ...kidding.

[Logan]

It's called CSS (Cascading Style Sheets) and can be implemented with "[css-div]" BB code tags. There's a CSS help and discussion thread in the Computers & Technology forum; I suggest you go there if you want to learn about CSS. Google is also a good place to find CSS tutorials.

[jigglyppuff8]

It's done with CSS. If you're curious as to how a poster did something within their post, easiest thing to do is to quote their post and examine their code.

[Owl]

Thats just CSS, not a wallpaper or anything XD

You can go here to learn about it! (http://www.pokecommunity.com/showthread.php?t=200899)