How to get a link from an HTML page to specific SWF in Flash movie?

Hello,

Sorry to post this simple question but this challenge landed in my lap and I know next to nothing about Flash or esp. AS3.

I need to know how to write the code that would allow a link from the html page to load a specific swf in the Flash movie. 

The flash movie currently has buttons that load the specific SWF into a loader.  The user needs to be able to essentially click through that button from the html/url link (not having to hit the flash movie THEN find and click the button.

The code in AS3 for the buttons is as follows:

//

Alpha_btn.addEventListener(MouseEvent.CLICK,Alpha1911);

function Alpha1911(e:MouseEvent): void {

    galleryLoader.source = "flash/1911Alpha.swf";

}

BarnesEff_btn.addEventListener(MouseEvent.CLICK,BarnesEff713);

function BarnesEff713(e:MouseEvent): void {

    galleryLoader.source = "flash/713BarnesEff.swf";

}

etc...

//

I hope this makes sense.

Thanks!

Bull