RadioButton  - AS3 Flex

<?xml version="1.0"?>
<!-- controls\button\RBEvent.mxml -->
<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">
    
    <fx:Script>
        <![CDATA[   
            
            import flash.events.Event;
            
            private function handleNonstop(event:Event):void {
                // Handle event.
                myTA.text="You selected nonstop flights";
            }
            
            private function handleOneStop(event:Event):void {
                // Handle event.
                myTA.text="You selected one stop";
            }
            
            private function handleTwoStops(event:Event):void {
                // Handle event.
                myTA.text="You selected two stops";
            }
        ]]>
    </fx:Script>
    <s:VGroup paddingLeft="10" paddingTop="10">
        <s:RadioButton groupName="numStops" 
                       id="nonStop"
                       label="Nonstop flights only" 
                       width="150" 
                       click="handleNonstop(event);"/>
        <s:RadioButton groupName="numStops" 
                       id="oneStop"
                       label="One stop" 
                       width="150" 
                       click="handleOneStop(event);"/>
        <s:RadioButton groupName="numStops" 
                       id="twoStops"
                       label="Two stops" 
                       width="150" 
                       click="handleTwoStops(event);"/>
        <s:TextArea id="myTA"/>
    </s:VGroup>
</s:Application>