[udaaff]

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
	<mx:Script>
		<![CDATA[
 
			[Bindable]
			private var menubarXML:XMLList =
			<>
				<menuitem label="Menu1" data="top">
					<menuitem label="MenuItem 1" data="1" type="check" toggled="false"/>
				</menuitem>
			</>;
 
			private function button_clickHandler(event:MouseEvent):void
			{
				menubarXML..*.(@label == "MenuItem 1").@toggled = true;
			}
		]]>
	</mx:Script>
 
	<mx:MenuBar id="menuBar" dataProvider="{menubarXML}" labelField="@label"/>
	<mx:Button id="button" y="200" click="button_clickHandler(event);" />
 
</mx:Application>