Clearing a function?

Hey everybody, quick question.

I set a function for

this.onEnterFrame = function(){
code;
}

but later I want this onEnterFrame to stop functioning to conserve on processor resources. setInterval isn’t too good of an option from the way I have things set up, so right now I just set it to a new function with a trace action which overwrites the old one.

Is there a command to simply just clear or break the function from executing?

–EP