An exemplary embodiment provides a program for controlling a display capable of providing stereoscopic display. The program includes image output instructions for outputting an image for left eye and an image for right eye to the display, parallax calculation instructions for calculating parallax produced when an object is displayed on the display, and movement-and-display instructions for carrying out at least one of movement of a displayed object out of an effective display range and movement of a not-displayed object into the effective display range in accordance with the calculated parallax.