flex PopMenu(demo)

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" creationComplete="init()">
     <mx:Script>
        <![CDATA[
       //µ¼ÈëÐèÒªµÄ°ü
            import mx.controls.Menu;
            import mx.events.MenuEvent;
            import mx.controls.Alert;          
            import flash.geom.Point;
            import flash.events.MouseEvent;
            //ÉùÃ÷Ò»¸ö±êÃ÷Êó±êλÖõÄÀà
            private var point1:Point = new Point();
            //ÉùÃ÷²Ëµ¥
            private var myMenu:Menu;
            //¶¨Ò嵯³ö²Ëµ¥º¯Êý
             private function showMenu(event:MouseEvent):void {
             //´´½¨µ¯³ö²Ëµ¥£¬Ö¸Ã÷µ¯³ö²Ëµ¥µÃÄÚÈÝ
                myMenu= Menu.createMenu(panel, myMenuData, false);
                //Ö¸Ã÷µ¯³ö²Ëµ¥£¬ÏÔʾµÄ×Ö¶Î
                myMenu.labelField="@label"
            &nbs