rhand 0 Newbie Poster

I have a JavaScript that makes images float in the background as soon as you move your mouse pointer over the browser screen. I got this script from the maker of the old site, who I cannot contact anymore. The problem is that every time an image is about to leave the screen the scrollbar/screen enlarges until the image has left the screen. I really want to get rid of that ugly sight. A simple css

body {overflow:hidden}

won't work cause I won't be able to scroll anymore at all.
So I am thinking that the javascript might be the culprit or I need a better CSS trick. I'd say I need a javascript fix to stop the browser window from expanding when an image exit, without removing horizontal scrolling for the content. I hope there is someone who knows something about javascript and or CSS to help me out. In another thread earlier I had a whole bunch of problems I seem to have solved, but this one won't go away. Here is the test site link. Please have a look.