Help, modifying block of code

1

i have an AS3 for photo gallery that loads photo from folder, i want to modify the code so it will load photos from my library.

heres the code.

var imageNumber:Number=1;

function checkNumber():void {
	next_btn.visible=true;
	previous_btn.visible=true;
	if (imageNumber==10) {
		next_btn.visible=false;
	}
	if (imageNumber==1) {
		previous_btn.visible=false;
	}

}
checkNumber();

next_btn.addEventListener(MouseEvent.CLICK, nextImage);
function nextImage(evtObj:MouseEvent):void {
	imageNumber++;
	imageGallery.source="images/Picture_t"+imageNumber+".jpg";
	checkNumber();
}

previous_btn.addEventListener(MouseEvent.CLICK, previousImage);
function previousImage(evtObj:MouseEvent):void {
	imageNumber--;
	imageGallery.source="images/Picture_t"+imageNumber+".jpg";
	checkNumber();
}


import fl.transitions.Tween;
import fl.transitions.TweenEvent;
import fl.transitions.easing.*;

imageGallery.addEventListener(Event.COMPLETE, imageLoaded);
function imageLoaded(event:Event){
new Tween(imageGallery, "rotationX", Elastic.easeOut, 90, 0, 2, true);
}

pls help. thanks.