public void removeAllContentPage() {
        Component win = content.getFellowIfAny("employee");
        if (win != null) {
            content.removeChild(win);
            return;
        }
        win = content.getFellowIfAny("person");
        if (win != null) {
            content.removeChild(win);
            return;
        }
        win = content.getFellowIfAny("company");
        if (win != null) {
            content.removeChild(win);
            return;
        }
        win = content.getFellowIfAny("result");
        if (win != null) {
            content.removeChild(win);
            return;
        }
    }