is it possible to switch the stage from one class... to another?

[astroair]

I am new to Flash Builder and AS3.  I have a general architectural question... that leads to a more specific one.

I am creating an iOS app for my business... I want to have a homepage with multiple buttons... each button is to take me to a different page... on these pages, I will have drop down menus that will allow me to access a database...

I have started with one .as file (Main.as)... where I create the buttons... and add the event listeners for each button...

What I wanted to do was to have each event listener (button click) instantiate a new class (which would be in a separate .as file).  These new classes would create a new page... and have it's own event listeners.... but, this doesn't seem to work since the stage is attached only to Main.as... so, I am a little confused as to why this is the case... and about finding a workaround... it just seems really cumbersome to have everything located in the same file... in the same Class...

[astroair]

or... I may be on the wrong track altogether... a better question may be what would be the best way, architecturally speaking, to create an app with multiple pages... where each page has different functions - specifically, interfacing with a database.