import flash.display.Sprite;


var image_holder:Sprite = new Sprite();
addChild(image_holder);

var loader:Loader = new Loader();

image_holder.addChild(loader);
loader.load(new URLRequest("test.jpg"));
loader.contentLoaderInfo.addEventListener(Event.COMPLETE, onLoadComplete);

function onLoadComplete(evt:Event):void {
	loader.width = stage.stageWidth;
	loader.height = stage.stageHeight;

	var increase_button:Sprite = new Sprite();
	increase_button.graphics.beginFill(0xFFCC00);
	increase_button.graphics.drawRect(40, 40, 40 ,40);
	addChild(increase_button);

	var decrease_button:Sprite = new Sprite();
	decrease_button.graphics.beginFill(0xFFCC00);
	decrease_button.graphics.drawRect(85, 40, 40 ,40);
	addChild(decrease_button);


}

increase_button.addEventListener(MouseEvent.CLICK, ZoomIn);

function ZoomIn(evt:Mouse):void {
	loader.width += 0.2;
}