Touch panel input device and processing execution method

A touch panel input device for controlling processing corresponding to a touching or pressing of an operation key displayed on a touch panel screen, the touch panel input device comprising:

• a multiple key press detection unit for detecting that a plurality of operation keys are multiply pressed, wherein each operation key has a corresponding pre-assigned fixed priority value;
• a first processing execution control unit for controlling, if the plurality of operation keys were multiply pressed, execution of processing corresponding to the operation key having a highest priority value of operation keys multiply pressed;
• a waiting unit configured to set a standby state that waits until a user makes a selection instruction corresponding to the plurality of operation keys multiply pressed;
• a selection instruction accepting unit for accepting the selection instruction during the standby state;
• and
• a second processing execution control unit for controlling, if the selection instruction accepting unit accepts the selection instruction, execution of processing based on the selection instruction;
• and
• wherein if the user fails to make a selection during the standby state, the second processing execution control unit controls execution of processing corresponding to the operation key of the plurality of operation keys multiply pressed having the highest priority value.