Advice wanted: Best, least CPU-intensive fade-in/-outs?

Hi Everyone,

I have a simple question. I’m just wondering what you experts think is the best, least CPU-consuming way to fade images in and out, such as on menu button rollovers and rollouts. I know of only about two ways to do this, but I’ve seen others do it in myriad of other ways that I’m curious about.

Thanks guys,

macgirl
PS: I also posted a question about a multi-level dropdown menu that I’d like some input - I hope someone can respond…