ActionScript 3.0 :: Selecting Which SWF File Will Be Loaded By Code

There are 100 buttons in my movie clip and a timeline of 10 frames length. If user clicks on button1, the movie clip will play and at the last frame it will redirect to second scene (scene2) and then "on scene2's first frame" "externalscene1.swf" will be loaded. If user clicks on button 5 then on scene2's first frame "externalswf2.swf" will be loaded.

Here the normal code i wrote :
//SCENE1 - 1st frame :
st1.addEventListener(MouseEvent.CLICK, a1001e);
function a1001e(eeevt:MouseEvent):void {
MovieClip(root).play(); << I want to assign a variable (the swf name to be loaded)
}

//SCENE2 - 1st frame:
stop();
var loader3:Loader = new Loader();
loader3.load(new URLRequest("1004.swf")); << I want to load variable.swf and load that swf.
addChild(loader3);