Really need help (please!)

Hi
I am really stuck on something trying to get my head around it for hours now.

Please view the attahced image which represent visually what I am trying to achieve.

I will explain it here as well. I have a long list of numbers(Movieclips) aligned horizontally. I have a scroller that span across five number clips the user can drag the scroller to move. I want to dispatch over function inside the number clips whenever the scroller moves over them and likewise out and click event.

I dont know how to detect that like if it was move over i could just define a mouse mover event but this trying to detect when a movieclip is over/out other clips.

Please view the image to clarify this.

thanks