fadeIn help needed

This is my_problem:

I have 4 movies and a MovieClip prototype fadeIn function.
I’d like to fadeIn the 2nd movie only when the 1st finishes to fade, then fadeIn the 3rd movie when the 2nd finishes and so on…
But if I try:
mc1.fadeIn
mc2.fadeIn
mc3.fadeIn
mc4.fadeIn
the movies fades in all together.

Can someone help me pls?
Thanx.
natspace