Preloader in AS3

on first Key frame the following code

loader is a movie Clip

percent is a text field

stop();

addEventListener(Event.ENTER_FRAME, preloader);

function preloader(evet:Event){   
    var load_value:Number = this.loaderInfo.bytesLoaded / this.loaderInfo.bytesTotal;
    loader.scaleX = load_value;
    if (this.loaderInfo.bytesLoaded == this.loaderInfo.bytesTotal){
        this.gotoAndStop(2);
        removeEventListener(Event.ENTER_FRAME, preloader);
    }
}