i = s.addItem(TimeFormat.Format12H);
i.getItemProperty("caption").setValue("12H");
i = s.addItem(TimeFormat.Format24H);
i.getItemProperty("caption").setValue("24H");
s.select(DEFAULT_ITEMID);
s.setImmediate(true);
s.addValueChangeListener(new ValueChangeListener() {
private static final long serialVersionUID = 1L;