I have a site which uses a javascript tab menu. The problem I have is when you click on the tab menu e.g. "browse artists" and then close the tab ( when viewing in firefox), the flash embedded on the page is moved up to the top of the page for a split second, then back down. Is this a javascript thing or a CSS thing?

any help would be appreciated. I have tried various methods of laying out with CSS (floats and absolute positioning) with no luck. the page also validates fine.