actionscript 3 - Flex menuitem from menubar disable -

i have small issue related enabling/disabling menuitems in flex.

the question can disable directly menuitem not it's sub-menuitems.

i have following menu structure:

public var menuagroapp:xmllist =         <>             <menuitem label="admin">                 <menuitem label="option 1"/>                 <menuitem label="option 2"/>                 <menuitem label="option 3"/>                 <menuitem label="option 4"/>             </menuitem>             <menuitem label="prices">                 <menuitem label="price 1"/>                 <menuitem label="price 2"/>                 <menuitem label="price 3"/>             </menuitem>             <menuitem label="orders">                 <menuitem label="order 1"/>                 <menuitem label="order 2"/>             </menuitem>         </>; 

with code can disable menu "admin" not option:

menuprincipal.datadescriptor.setenabled( xml(modeloglobal.modelo.menuagroappcollection.source[0]), false ); 

the question that, how can access menuitems within admin menuitem?

thanks.

here solution , working example:

in order take control on submenu item need navigate using xml expressions , point first element of list. because xml-expression delievers xmllist in common case.

<?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:script>     <![cdata[         [bindable]public var menuagroapp:xmllist =             <>             <menuitem label="admin">                 <menuitem label="option 1"/>                 <menuitem label="option 2"/>                 <menuitem label="option 3"/>                 <menuitem label="option 4"/>             </menuitem>             <menuitem label="prices">                 <menuitem label="price 1"/>                 <menuitem label="price 2"/>                 <menuitem label="price 3"/>             </menuitem>             <menuitem label="orders">                 <menuitem label="order 1"/>                 <menuitem label="order 2"/>             </menuitem>             </>;          protected function ononoffadmin(event:mouseevent):void         {             mymenubar.datadescriptor.setenabled(menuagroapp[0], false);         }          protected function ononoffadminoption2(event:mouseevent):void         {             mymenubar.datadescriptor.setenabled(menuagroapp[0].menuitem.(@label == 'option 2')[0], false);         }      ]]> </fx:script>  <s:vgroup x="30" y="30">     <mx:menubar id="mymenubar" labelfield="@label" dataprovider="{menuagroapp}"/>     <s:spacer height="20"/>      <s:button label="set off admin" click="ononoffadmin(event)" />     <s:button label="set off admin/option2" click="ononoffadminoption2(event)" /> </s:vgroup>  </s:application>