Rhapsody Playlist TextMaker

var songs = document.getElementsByClassName("track-list ui-sortable")[1].children;
var final = "";
var trackInfo = "";
var artistName = "";
var trackName = "";
for (var track=0;track<songs.length;track++) {
    trackInfo = songs[track].getElementsByClassName("track-info")[0];
    artistName = trackInfo.getElementsByClassName("album-name")[0].textContent.trim();
    trackName = trackInfo.getElementsByClassName("name")[0].textContent.trim();
    final += artistName + " - " + trackName + "\n";
}
console.log(final);


/* Original Version... website has been updated since so the above was created by Tesla0
var songs = document.getElementsByClassName("sortable-track-list track-list ui-sortable")[0].children;
var final = "";
for (var track=0;track<songs.length;track++) {
	final += songs[track].getAttribute("artist_name")+" - "+songs[track].getAttribute("track_name")+"\n";
}
console.log(final);
*/

How is this used? How do I hook this up? Is there a primer for hacking Rhapsody somewhere?