ActionScript 2.0 :: (Flash CS3) Defining Variables To Different Buttons?

I'm trying to assign actions to various buttons for a website I am building, however I would also like to play a little movie first each time before linking to their individual different frames. The movie is the same for each button but then, obviously each button ultimately needs to link to a different frame. I'm guessing a nifty mix of gotoandPlay and variables are the answer but I'm getting myself in knots.

The structure of the site is as follows.On the main stage I currently have 4 frames. Each frame contains a different "page" of the website. The "home" frame has the navigation bar (including a sub-menu movie which has a number of buttons nested inside it which I think is going to be tricky). At the end of the "home" movie, there is a little fade animation which is labeled/ red flagged on the timeline - and it's this little animation I would like to have playing when a button is clicked on before linking to another frame.

At the moment the best I can manage is that when the button is clicked it goes back to the beginning of it's movie (a problem with the target paths perhaps?) as opposed to a label within the parent movie.I also think where I'm getting confused is exactly where I am supposed to define all the various variables and pieces of actionscript. The little snippits of code I have are as follows: Within the button I am trying to link, so far I have:

on(release){
_level0.frame_to_goto = "artwork";
play();
}

The "artwork" tag is the frame specific to that button (this is one of the sub-buttons that is nested within a submenu movie).Then in the movie for the webpage I have the following in the last frame of the mini animation that I want to play before the button links to the artwork frame:

stop();
if(_level0.frame_to_goto != undefined){
_level0.gotoAndPlay(_level0.frame_to_goto);
}else{
trace("An error as occured!");
}