Positioning a cursor on the display screen of a computer

The computer system location a sensing electrode comprises a keyboard (11), a display screen (13); the pair (18.1) and (18.2), the second pair of the locating of sensing electrode (20.1, 20.2) signal injecting electrode (22) and a (27). The vibration signal - injecting electrode and temperature left hand (L), sum of a temperature signal body; with to the flow temperature the handle (R) field. Location a sensing electrode is arranged on the keyboard, and sensor field intensity. The relative to is arranged on the X-Y for determining temperature the handle (R) is arranged on the keyboard. , The invention can be connected with the synchronous detector (34,44) and simulation is digitizer (36), a locating of sensing electrode connected with the microprocessor (46), the operation can control the cursor, a locating on the display screen.