Hi all - I'm terrible with code so need a little help.
I'm designing a site in Photoshop and need to have some bars in the background that stretch to fit any sized screen.

For example:

http://www.websense.com/content/Home.aspx
http://www.freaklife.com/redirect/?theme=studionine

Can someone point me in the right direction as to how I can achieve this effect?

Thanks!