public void windowClosing(WindowEvent we){
				int eleccion = JOptionPane.showConfirmDialog(null, "Desea salir?","Salir",0,0,new ImageIcon(GUIMenu_Principal.class.getResource("/cliente/Recursos/Iconos/exit_login.png")));
				if ( eleccion == 0) {
					System.exit(0);
				}	
			}