A selectable element or an element image associated with the element is displayed on a screen of a display unit. A representation of a person whose image is captured with a detection unit, or an indicator that moves in conjunction with a motion of the person is displayed on the screen. The element or the element image is moved so as to be driven out of the representation or the indicator thus displayed. The element is judged as selected based on a movement degree or a post-movement position of the element or the element image thus moved.