The image-processing apparatus includes: a communication interface unit; a user interface display unit which is arranged to provide information to a user; a user interface input unit provided with a hardware-key which is arranged to receive an input from the user; a web browser which is arranged to acquire page data from a web server, structure a display screen based upon the page data, and display the display screen on the user interface display unit; a hardware-key function assignor which is arranged to determine a function to be assigned to the hardware-key based upon the page data; and a hardware-key control unit which is arranged to control the hardware-key in accordance with the determination of the hardware-key function assignment by the hardware-key function assignor.