Maintaining button down states during video timecode events?

Hi all,

I was wondering if it is possible to create a function that listens for a certain frame of time to be reached in a streaming video, and then moves a certain button to its down state.

I can’t find an example of an AS3 function that listens for timecodes to be reached by the playback head, and am not sure of the syntax for it…or for moving a button to its down state. In the past I think it might have been something simple like btn_Chapter1.gotoAndStop(“Down”) but that doesn’t seem to work.

If anyone wants to take a look at what I’m talking about in the context of my file, it is available at http://drop.io/MatherInteractive (password is ‘help’). In plain English, this is what I want to be able to do in AS3:[INDENT]
If timecode is between 00:00:00 and 00:04:58 then
btn_Chapter1 goes to “Down” state

If timecode is between 00:04:59 and 00:06:37 then
btn_Chapter2 goes to “Down” state

(etc., for btn_Chapter3 to btn_Chapter18)

[/INDENT]If anyone can help, thank you in advance!