Flex Event Target

<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" 
			   xmlns:s="library://ns.adobe.com/flex/spark" 
			   xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600">
	<fx:Declarations>
		<!-- Place non-visual elements (e.g.,services,value objects) here -->
	</fx:Declarations>
	<fx:Script>
		<![CDATA[
			import mx.controls.Alert;
			private function buttonClick(event:Event):void {
				trace(event.target.id);
				if(event.target.id == "buttonOne") {
					Alert.show(" button one was clicked");
				} else {
					Alert.show(" button two was clicked");
				}
			}
		]]>
	</fx:Script>
	<s:HGroup horizontalCenter="0" verticalCenter="0">
		<s:Button click="buttonClick(event)"
				  label="Click Me One" id="buttonOne"/>
		<s:Button click="buttonClick(event)"
				  label="Click Me Two" id="buttonTwo"/>
	</s:HGroup>
	
</s:Application>