Voetsjoeba Ease In?

I’m using Flash MX

Was wondering if anyone had any ideas on making Voetsjoeba’s golden formula ease “In” (slow to fast)

Here is the code for ease “out” (fast to slow):

MovieClip.prototype.ease = function(x,y){
        this.onEnterFrame = function(){
                this._x = x-(x-this._x)/1.1;
                this._y = y-(y-this._y)/1.1
                if(this._x > x-1 && this._x < x+1 && this._y > y-1 && this._y < y+1){
                        this._x = x;
                        this._y = y;
                        delete this.onEnterFrame
                        //do other stuff here, this is the point at which the object reaches its target

Mad props to Voetsjoeba by the way.