Can I kill function?

Pretty easy question… is it possible to disable function after you did a certai action… For exemple after I click on btc

this.btc.onRollOver = function () {
btc.gotoAndPlay("_over");
}

this.btc.onRollOut = function () {
btc.gotoAndPlay("_out");
}

this.btc.onRelease = function () {
close1.gotoAndPlay("_click");
}

is it possible to disable all the function before (probably i need to put a name between the “()” )