I'm using the portal with navbars at both sides. Left side is navigation, right side are links to sponsor websites, picture of the day, small shoutbox & who's online.
I'd like to have the left navbar at the left side at all times, but the right navbar is less important and regarding the width of the forum I'd like to disable the right navbar only while people browse the forums. I don't really know how to get this done. 
Summary: I want to disable the right navbar @ the forum part of the website.
Thank you in advance! 