Yes opacity will help with

decibel.places — Wed, 29 Oct 2008 01:35:27 +0000

Yes opacity will help with dissolves, but for linear animation I think you need to use tweening.

Here is an old banner I made just with tweening.

I don't do much flash work anymore, I find it more economical to subcontract it, but I still like the retro B&W space opera feel of this banner.

[note: client never responded after I created it - maybe he was trying to rip me off!]

You shouldn't need

JeevesBond — Tue, 28 Oct 2008 21:07:19 +0000

You shouldn't need ActionScript to do this. Just use the time line, and change the opacity at key frames.

Have you had a look at the help that comes with Flash? There're some tutorials there that will show you how to do exactly this sort of thing.

Sorry no-one has replied to your post sooner.