AS 3: can a child call a function in its parent

Hi:

I have a function (let’s call it testFunction for right now ) on the actions layer in the main timeline
There is a movie clip with 15 frames long in the library

i want to add a child of the movie clip on the stage, and call testFunction when it finishes playing

how can i do?
i tried to call it in the child but nothing works

Or, is there any way to show child on the stage for only a period of time like 1 second and then remove it automaticly??