Working with multiple .as files question

Hi.

I am trying to find out how to make one .as file code interact with another .as file’s code.

like, if I had one .as file that specified options of movies and then when the user clicks on a movie (loaded through xml) it uses code from another .as file to load the correct movie.

can someone point me to a tutorial or tell me what to study up on pls?

thanks fro any help!