Navagiting or accessing objects added to stage

I have a structure display like this: (brackets shows the depths, within their parent)

my question concerns ‘communication’ between the highlighted objects - so you don’t have to waste time understanding the whole tree! I’ve just added this to provide some context!

[COLOR=Gray]mc_init (0)
[COLOR=White]___[/COLOR]|
[/COLOR][COLOR=Gray][COLOR=Gray][COLOR=White]___[/COLOR]mc_page (0)[/COLOR]
[COLOR=White]______[/COLOR]|
[/COLOR][COLOR=Gray] [COLOR=Black][COLOR=White]______[/COLOR]rectangleBG (0)[/COLOR]
[COLOR=White]______[/COLOR]|
[COLOR=White]____[/COLOR]textTitle (1)
[COLOR=White]
[/COLOR]|
[COLOR=White]___[/COLOR]mc_setup (1)
[/COLOR][COLOR=White]______[/COLOR][COLOR=Gray]|
[/COLOR][COLOR=White]______[/COLOR][COLOR=Gray]mc_setupBG (0)
[/COLOR][COLOR=White]______[/COLOR][COLOR=White]______[/COLOR][COLOR=Gray]|
[/COLOR][COLOR=White]______[/COLOR][COLOR=White]______[/COLOR][COLOR=Gray]mc_site (0)
[/COLOR][COLOR=White]______[/COLOR][COLOR=White]______[/COLOR][COLOR=Gray]|
[/COLOR][COLOR=White]______[/COLOR][COLOR=White]______[/COLOR][COLOR=Gray]mc_pref (1)
[/COLOR][COLOR=White]______[/COLOR][COLOR=White]______[/COLOR][COLOR=Gray]|
[/COLOR][COLOR=White]______[/COLOR][COLOR=White]______[/COLOR][COLOR=Gray]mc_edit (2)
[/COLOR][COLOR=White]______[/COLOR][COLOR=White]__[/COLOR][COLOR=White][/COLOR][COLOR=Gray]|
[/COLOR][COLOR=White]______[/COLOR][COLOR=White]__[/COLOR][COLOR=White][/COLOR][COLOR=Gray]text (0)
[/COLOR][COLOR=White]______[/COLOR][COLOR=White]__[/COLOR][COLOR=White][/COLOR][COLOR=Gray]|
[/COLOR][COLOR=White]______[/COLOR][COLOR=White]__[/COLOR][COLOR=White][/COLOR][COLOR=Silver][COLOR=Black]btn (1)[/COLOR]
[/COLOR]

[COLOR=Black]Now, its easy to add a mouse event to btn(1), but how do I get this button to set the visible property (say) of ‘[/COLOR][COLOR=Black]rectangleBG(0)’[/COLOR]

So my question is how do I access the paths? of these objects added to the stage?

any help on this would help my headache to go away! ;(
Ikonik