Added opaque param to flash fallback

I was using a z-index with buttons that appear over my flash movie. The buttons were appearing underneath the flash movie due to a bug I found discussed here: http://stackoverflow.com/questions/761402/why-doesnt-z-index-in-ie-render-the-way-its-supposed-to-over-a-flash-movie

I've modified my own local copy and it works successfully using the extra param.