[Tato]

			private var fr:FileReference = new FileReference();
			private var fil:FileFilter = new FileFilter("img (png, jpg)", "*.png;*.jpg");
 
			protected function button1_clickHandler(event:MouseEvent):void
			{				
				fr.browse([fil]);
				fr.addEventListener(Event.SELECT, load);
			}
 
			protected function load(e:Event):void
			{
				fr.addEventListener(Event.COMPLETE, comp);
				fr.load();
			}
 
			protected function comp(e:Event):void
			{
				img.source = fr.data;
			}
 
...
 
	<mx:Image id="img" width="300" height="300"/>
	<mx:Button label="Button" click="button1_clickHandler(event)"/>