Patent ID: 7664630

Claim:
A method of adding a predetermined program to a program operating on an information terminal device which can communicate with a server via a communication line, the method comprising: activating a first program prestored in a memory of the information terminal device; displaying first link information stored in the memory on a display of the information terminal device to guide a second program which adds a function to the activated first program; transmitting to the server, information containing at least one of first identification information for identifying the first program and second identification information for identifying the second program, when the first link information displayed on the display is selected; receiving the second program transmitted from the server in accordance with at least one of the first identification information and the second identification information; updating, after receiving the second program, the first link information displayed on the display to second link information guiding a third program which adds a new function and which is different from the second program, thereby displaying the second link information on the display.