actionscript - Action Script 2, I want to stop the counting down to 0 -

i need action script 2.0

i have scoreboard system 2 buttons 1 count number , other count down if need to. however, problem count down button.

count down button code:

on(release) { score.text = 0;  score.text = scorebk _root.scorebk--; 

if score 9 example when count down adds 1 , counts down normally, when score 0 goes -1...etc. not want that. how can stop button going minus? , counts normally.

you have check value greater 0 before decrement:

on(release) {        if(scorebk > 0){        scorebk--;       }     score.text = scorebk;  }