A touch switch for controlling accessory equipment of a vehicle avoids a malfunction which is caused due to an environmental change such as a change in a state of air, arrival of unnecessary electromagnetic waves, or the like. A controller receives the throttle position signal and operates the water injection system such that the rate of water injection will be increased in the event that the time rate of change of the throttle position signal indicates that the throttle pedal is being depressed at a rate exceeding a predetermined threshold. The controller calculates a billing amount per fixed time interval on the basis of the performed write count, calculates tier ranges so that the billing amount per fixed time interval does not exceed the billing upper limit value, and relocates the real page on the basis of the calculated tier range. The gastrointestinal disease may be classified as either inflammatory bowel disease or other GI condition including Crohn’s disease and ulcerative colitis, and cancer. Therefore, a copy of a quality as high as that of the original document can be produced.