How can i speed this up?

1

i was looking at the Complex Button RollOver/RollOut Effects (http://www.kirupa.com/developer/mx2004/button_effect.htm), tried it out and it’s working like a champ… but what i wanted to know is how can i speed up the rewind. instead of going to the previous frame (prevFrame()) how can i tell it to go back every two frames, every five frames, or every ten frames, etc:

this.onEnterFrame = function(){
if(rewind == true){
**prevFrame();**
}
}
 
this.onRollOver = function(){
rewind = false;
play();
}
 
this.onRollOut = function(){
rewind = true;
}