Referring to var set in loaded mc

Hi all

I have 4 frames in an mc called sections_mc. When a button in a seperate mc is rolled over, the frame in sections_mc changes to the appropriate one.

However, when you rollout from the button, I want the sections_mc to jump back to the current frame (that is, the section name of the mc currently loaded into holder_mc on the _root timeline, each called one, two, etc .swf).

Should I set a variable on the timeline of each swf to refer to?

Heres what I need, in a nutshell

root.section_mc.gotoAndPlay(the same name of the movie currently loaded in _root.holder_mc, whether referring to a variable set in its root timeline or otherwise)

Any ideas?