Something

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" backgroundGradientAlphas="[1.0, 1.0]" backgroundGradientColors="[#272727, #000000]">
	<mx:Script>
		<![CDATA[
			import mx.rpc.events.FaultEvent;
			import mx.rpc.events.ResultEvent;
			import mx.controls.Alert;	

			private function test():void {
				trace("HERE");
			}
		]]>
	</mx:Script>
	
    <mx:ArrayCollection id="photos">
        <mx:source>
            <mx:Array>
                <mx:Object label="Photo 1" icon="@Embed('../assets/1.jpg')" />
                <mx:Object label="Photo 2" icon="@Embed('../assets/2.jpg')" />
                <mx:Object label="Photo 3" icon="@Embed('../assets/3.jpg')" />
                <mx:Object label="Photo 4" icon="@Embed('../assets/4.jpg')" />
            </mx:Array>
        </mx:source>
    </mx:ArrayCollection>
    	
	<mx:VBox>
		<mx:Panel>
			<mx:Image id="preview" width="340" height="200" source="../assets/1.jpg">
			</mx:Image>
			<mx:TileList
				id="thumbtiles"
				dataProvider="{photos}"
	            columnWidth="100"
	            rowCount="1"
	            rowHeight="100"
	            direction="horizontal"
	            click="test()"
	            >
			</mx:TileList>
		</mx:Panel>
	</mx:VBox>
</mx:Application>