Whiteboard animation filming

I need to know filming techniques for whiteboard animation kind of like this one.

http://www.digitalbionic.com/whiteboard/whiteboard_sample/whiteboard.html

I really need to know how they do the camera movement and thats it. We have a very good artist. A large whiteboard on a wall, good lighting. I just need to know how they do the camera movement. Especially when they are moving from left to right and going up and down at the same time.

Thanks;

Kevin Gonzales
http://www.12point.net