Add handlers and then remove handlers

            
<?xml version="1.0"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
    initialize="createHandler(event)">
    <mx:Script>
    import mx.controls.Alert;
    private function createHandler(e:Event):void {
        b1.addEventListener(MouseEvent.CLICK, myClickHandler);
    }
    private function removeMyHandlers(e:Event):void {
        b1.removeEventListener(MouseEvent.CLICK,myClickHandler);
        b2.removeEventListener(MouseEvent.CLICK,myClickHandler);
    }
    private function myClickHandler(e:Event):void {
        Alert.show("This is a log message");
    }
  </mx:Script>
    <mx:Button id="b1" label="Click Me" />
    <mx:Button label="Click Me Too" id="b2"
        click="myClickHandler(event)" />
    <mx:Button label="Axe Listeners" id="b3"
        click="removeMyHandlers(event)" />
</mx:Application>

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Add handlers and then remove handlers : Event Handler « Event « Flex

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