atatchSound onPress instead of onKeyDown?

programming flash
1

How could I alter this code so that it works onPress?

var ranSound = new Sound(this);
ranSound.onPress = function() {
        if (Key.isDown(Key.SPACE)) {
                this.stop();
                this.attachSound("s"+Math.round(Math.random()*11));
                this.start();
        }
};
Key.addListener(ranSound);