I took the parts of the code that have to do with this and created an html file. It can be reached
http://64.22.69.19/~ptosc/rollover/change_image.htmlIf you view that in IE, it will work fine. If you view it in Firefox, it will work once if you rollover the Natural box then it no longer works until the page is reloaded. The complete code is below. The variables are not global. They were just not declared.