@Override
		public void mouseClicked(MouseEvent arg0)
		{
			if(list != null & list.getSelectedIndex() > -1)
			{
				switch (list.getSelectedIndex())
				{
					case 0:	//common preferences are selected
						mainPanel.add(lookAndFeelPanel);
						break;
					case 1:
						mainPanel.add(pathAudioPanel);
						break;
					case 2:
						mainPanel.add(langLogPanel);
						break;
					default:
						mainPanel.add(lookAndFeelPanel);
				}
			}
		}