Problems figuring out random flv player

I am still kind of a noob with AS3. Any idea how I could incorporate an array into the following simple player which would pull a random file from a separate folder after the user’s chosen video has played?:

function videoOne(event:MouseEvent):void{
    pubPlayer.source = "flvs/01.flv";
function videoTwo(event:MouseEvent):void{
    pubPlayer.source = "flvs/02.flv";
function videoThree(event:MouseEvent):void{
    pubPlayer.source = "flvs/03.flv";

OneV.addEventListener (MouseEvent.CLICK,videoOne);
TwoV.addEventListener (MouseEvent.CLICK,videoTwo);
ThreeV.addEventListener (MouseEvent.CLICK,videoThree); 

I am trying to arrange for a button to be pushed and for the selected video to play and then to load a random response video after selected video is finished playing. I am thinking it would be similar to a commercial playing after a video. Thanks so much!