A communication terminal apparatus includes a communication section that controls communication to a destination and a browser that analyzes hypertexts, and displays an image in accordance with the analyzed hypertexts on a display, the image having at least an input field. Hardware keys are configured to input numbers and characters, and are selectively operable in a first mode to input a destination number to the communication section in order to communicate with the destination, and in a second mode to input data to the input field. An off hook detector detects whether the communication section is in an off hook condition and a controller controls a status of the hardware keys in one of the first and second modes. The controller, when the off hook detector detects that the communication section is in the off hook condition and when the hardware keys are in the second mode, switches the input of the hardware keys, from the second mode to the first mode.