ActionScript 2 XML Photo Gallery

Hello! I’ve made a photo gallery and it’s working but, i want to make a scrollbar for the thumbnails and i don’t know how to make it. I wan’t to make a scrollbar something like this http://cursurifotografie.ro
Here is the AS2 code:

loader.onEnterFrame = function(){
this.loadMovie(“img1/1.jpg”);
loader2.loadMovie(“img1/1.jpg”);
loader2._alpha=40;}

myPhoto =new XML();
myPhoto.ignoreWhite = true;
myPhoto.onLoad = function(){
nrImages =this.firstChild.childNodes.length;
spacing =65;
for(i=0; i<nrImages; i++){
this.picholder=this.firstChild.childNodes*;
this.thumbholder=thumbnails.createEmptyMovieClip(“thumbnail”+i,i);
this.thumbholder._y =i*spacing
this.thumbloader = this.thumbholder.createEmptyMovieClip(“thumbnail2”, 0);
this.thumbloader.loadMovie(this.picholder.attributes.imgSmall);
this.thumbholder.title =this.picholder.attributes.imgTitle;
this.thumbholder.mare=this.picholder.attributes.imgBig;
this.thumbholder.onRelease = function(){
loader.loadMovie(this.imgBig);
loader2.loadMovie(this.imgBig);
loader2._alpha=40;
title_txt.text=this.title;
}
}
}
myPhoto.load(“galery.xml”);