Is it possible?

example: background: url(something.swf)no-repeat;

?

Thanks

As far as I know this cannot be done, but give it a try and let me know if it works:) If it did work I can't imagine it looking great

well i just used the transparent para when doing it...

you can see an example at: http://omfl.leaguepulse.com

I don't think it can be done with the background property.
Note that in some browsers even gif-animations aren't properly supported in the bg.