onRelease > swap function?

Hello,
I have a rollOver / rollOut state on a MC. Is there an easy way to stop its rollOut state after it has been ‘released’?

myMC.onRollOver = function(){ plonk;}
myMc.onRollOut = function(){ plink;)
myMc.onRelease = function(){ 
myMc.disable.onRollOut();        //???
}

Any ideas?
Thanks!!