In FIG. 6B, the navigation display area 35b is set to minimum area required for displaying map data while the behavior display area 35a is set large. The touch-panel type operational area 34b remains below the behavior display area 35a and the navigation display area 35b. In another example, it is possible to appropriately arrange touch-panel type operational buttons in the behavior display area 35a and/or the navigation display area 35b with the operational area 34b eliminated as described above.