Check event target id
<?xml version="1.0" encoding="utf-8"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" > <mx:Script> private function buttonClick(event:Event):void { trace(event.target.id); if(event.target.id == "buttonOne") { trace(" button one was clicked") } else { trace(" button two was clicked"); } } </mx:Script> <mx:Button click="buttonClick(event)" label="Click Me One" id="buttonOne"/> <mx:Button click="buttonClick(event)" label="Click Me Two" id="buttonTwo"/> </mx:Application>