one button-two operations

[savnik]

I have this code in my programm:

LOOP:
Button CH,0,255,0,b3,1,UHF 'b3 var BYTE
Button CH,1,255,0,b3,1,VHF 'CH var PORTB.5
PAUSE 100
GoSub POSTING
GoTo LOOP

UHF:.................
.................
GoTo LOOP

VHF:.................
.................
GoTo LOOP

I want if push one time the button and release to go to UHF and if push again and release to go to VHF and if push again and release to go to UHF , and so on