public void playBackgroundMusic(){
		if (NineManMill.PLAY_MUSIC){
			if (NineManMill.bgplayer!=null && NineManMill.bgplayer.isActive()){
				return; //already playing
			}
			try {
				NineManMill.bgplayer.playBGMusic();
			} catch (Exception e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}