public ArrayList finnAlleCder(String _artist){
		ArrayList<String> cder = new ArrayList<String>();		
		for(int i=0 ; i<cdListe.size() ; i++){
			if (cdListe.get(i).visArtistNavn().equalsIgnoreCase(_artist)) {
				cder.add(cdListe.get(i).visTittel());	
			}
		}
		Collections.sort(cder);
		return cder;
	}