[ubuntu] How to hide the top menu bar in 12.10

view story

http://ubuntuforums.org – Hello, I am trying to run an application in fullscreen mode, and its just this application that will be displaying various info on the screen. Therefore I want to hide everything else. I can hide the Launcher, but how do I hide the top menu bar at the very top of the screen. Because when I run the application, I can still see the top menu bar. I'm thinking of this menu bar http://s13.postimage.org/3rs1sls7r/ubuntu.png Is there any way I can hide it? I've tried to google for solutions, but no go. The application is signageplayer from digitalsignage. http://www.digitalsignage.com/html/ (Hardware)