[Кип]

Попробуйте так:

<?xml version="1.0"?>
<!-- Simple example to demonstrate the ComboBox control. -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" backgroundGradientColors="[0x000000,0x323232]" viewSourceURL="srcview/index.html">
 
    <mx:Script>
        <![CDATA[
        	import mx.controls.ComboBox;
            import mx.collections.ArrayCollection;
 
            [Bindable]
            public var cards:ArrayCollection = new ArrayCollection(
                [ {label:function1, data:1}, 
                  {label:function2, data:2} ]);
 
            private function closeHandler(event:Event):void {
                //...
 
                var cbox:ComboBox = event.target as ComboBox;
                cbox.selectedItem.label();
 
            }   
            private function function1():void {
                label1.text = "function1";
            }
 
            private function function2():void {
                label1.text = "function2";
            }  
        ]]>
    </mx:Script>
    <mx:ComboBox dataProvider="{cards}" width="150" color="0x000000"
        close="closeHandler(event);"/>
    <mx:Label id="label1" text=""/>
</mx:Application>