First random mp3 from xml list?

programming flash
1

Hello Kirupians,
A problem makes me grow grey hair: I would like to randomly load a song from my xml list when entering my site.
After doing a search I figured out I could do it with a math.random? Ok.
But could someone point me in the right direction how to incorporate that in my function?
Thanks for any suggestions :).

function loadData(success) {
	if (success) {
		aPath = new Array();
		songTitel = new Array();
		songArtist = new Array();
		songCover = new Array();
		audioTracks = new Array();		
		audioTracks = this.firstChild.childNodes;
		totalAudio = audioTracks.length;
		for (var i=0; i<totalAudio; i++) {
			if (audioTracks*.nodeName == "song") {
				aPath.push(audioTracks*.attributes.path);
				songTitel.push(audioTracks*.attributes.title);
				songArtist.push(audioTracks*.attributes.artist);
				songCover.push(audioTracks*.attributes.bild);
			}
		}
		AudioPath = aPath[0];
		titel = songTitel[0];
		artist = songArtist[0];		
		aktAudio = 1;
		trackAnzeige = aktAudio+" / "+totalAudio;
		status = "STATUS: PLAYLIST - LOADED";
		if (playerlook) setCover(0);
		erstesBild = true;
		setzeDirektwahl();
		setzePlaylistwahl();
		if (playatstart) playSong();
	} else {
		status = "STATUS: PLAYLIST - NOT LOADED";
	}
	delete audioTracks;
	delete data_xml;
}