public ArrayList<String> getParticipantNames() {
		ArrayList<String> participantsList = new ArrayList<String>();
		Iterator<String> participantsIter = participants.keySet().iterator();
		Participant partp;
		while(participantsIter.hasNext()) {
			partp = participants.get(participantsIter.next());
			if(partp.isOnline()) participantsList.add(partp.getName());
		}		
		return participantsList;
	}