* Lance une pop-up permettant de rajouter un horaire
*/
public void insertTimetables(){
Calendar cal = Calendar.getInstance();
cal.set(1970,0,1,8,0,0);
JSpinner time = new JSpinner( new SpinnerDateModel() );
JSpinner.DateEditor timeEditor = new JSpinner.DateEditor(time, "HH:mm");
time.setEditor(timeEditor);
time.setValue(cal.getTime());
Object[] message = new Object[] { "Horaire : ", time};