To simplify an operation on a touch panel such as a navigation system.

This program determines whether a touch action is performed at a certain position on the touch panel (step S1), calculates a time ΔtA till a finger begins to move if the touch action is performed (step S2), and compares the value ΔtA with a threshold value Th1 (step S3). A movement distance of the finger in the prescribed direction ΔY is calculated (step S4) and the value ΔY is compared with a threshold value Th2 (step S5). A movement distance per unit of time ΔDy is calculated (step S6) and whether the movement distance ΔDy is larger than threshold Th3 or not is determined (step S7). If each value satisfies the prescribed condition for each threshold value Th1, Th2, Th3, the action is determined as an input operation of an operation command to execute the particular action and the prescribed action is executed (step S8). On the one hand, if the prescribed condition is not satisfied, the operation is determined as a normal touch action (step S9).

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