Flash Transitions
http://www.flawebdeb.com/marchdebtip.htm

Berg, Debbie
WebDeb
2002

Abstract:

Transitions are a very popular technique used in Flash, and they're typically used to let your audience know that a change in content or scenery is coming. They're usually displayed using fading effects and dissolves, and there are two ways to implement this type of effect: an alpha tween and a brightness tween. Let's take a look at both of these techniques.