| 摘要 |
PROBLEM TO BE SOLVED: To avoid the unnecessary increase of traffic in a network and the unnecessary increase of load on a server side by receiving operation situation information from a main device and switching to the display of an operation element in a display screen according to the operation situation information. SOLUTION: When function operation situation information is notified, it is received by a processor (SP2). Next, the function operation situation information is analyzed (SP3) and it is decided whether or not a button operation situation is changed based on the analytical result (SP4). About a button whose state is changed, what state it is changed to is decided (SP7). When it is detected that it is changed to a state being functioning, it is changed to a display for being functioning (SP9). When it is detected that it is changed to a state in which selection is difficult, it is changed to a display for selection's being difficult (SP10). When the set button for being functioning or for selection' s being difficult is operated, an access tracking through link to a server is terminated with a management variable as a reference. |
