1) Script Title: Flying planes

2) Script URL (on DD): http://www.dynamicdrive.com/dynamicindex4/plane.htm

3) Describe problem: The flying planes script works great in internet explorer, but with firefox 3, every time a plane gets to the right side of the page, scroll bars appear which shouldn't be there.
And, when a plane touches the bottom of the screen it moves the main content of the page.
Any way of getting round this?
You can see it happening here :
http://aidanbremner.110mb.com/index2.html