Flying Planes scroll bar jump

[Alizarin]

1) Script Title: Flying Planes

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

3) Describe problem: Scroll Bar Jump in Mozilla, Safari

Hi~ I'm a ten year DD fan. I know there was a fix for the Butterfies script a ways back, but decided I really need the Planes script as I'm using UFO's.
I stripped the doc type down to htlm 4.0 that took care of the bounce in IE. (Now I can't use Div's to make the ships cross in front of and behind the other graphics, this I can live with). But still getting those pesky scroll bars appearing and disappearing in the other browsers when the ships hit the edges. Any help is greatly appreciated.
http://clearwaternursery.com/kids.html
Thanks! ~Alizarin

[azoomer]

Maybe this could help:

body   { background-image: url(images/landscape.jpg); margin: 0; overflow: hidden; }

[Alizarin]

Worked like a charm. Thank you so much azoomer!