Dear...
Functionality of SR-flipflop and JK-Flip flop are identical in SET,RESET,and HOLD operations.
JK-Flipflop is modified version of SR-Flipflop
1.The have different statesi.e JK-flipflop doesn,t have valid states
2. In SR Flip-Flop the input combination S=R=1 is not allowed where as in JK-Fliflop due to
feedback from slave FF output to master, J=K=1 is allowed.
J=K=1, toggle, action in FF
Hope this will help you...