Steady speed decrease

1

I’m using the following code to spin a couple stars on the stage when the mouse rolls over them. Can’t figure out how to make the stars slowly decrease in speed after the user rolls off though.

var stars:Array = [star1, star2, star3, star4, star5];
//-------------------------------------------------------//
for (s=0; s<stars.length; s++) {
    stars[s].onRollOver = sOver;
    stars[s].onRollOut = onDragOut=sOut;
    stars[s].useHandCursor = false;
}
function sOver() {
    if (starCond eq "t") { //---Disregard this if statement, deals with something else
        randInc = Math.floor(random(15));
        this.onEnterFrame = function() {
            this._rotation += randInc+1;
        };
    }
}
function sOut() {
    this._rotation += 0;
    delete this.onEnterFrame;
}

My footer uses the same effect.