Help needed creating wash-out effect

I’m looking to create this styled effect for transition between multiple mc’s.

This site is an example of the effect I’m looking to create featured in the intro. … pe/en.html
The ‘wash-out’ effect is used as a transition and I’m wondering the best way to accomplish this effect. Is is code or tween animation of the timeline and some sort of filter? Your help is appreciated. Thx!