flex 根据字符串获取对象

<?xml version="1.0" encoding="utf-8"?><mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical"><mx:Script><![CDATA[private var s:String = "test";private function init():void{this[s].text = "修改成功";this[s+"1"].text = "太神奇了";}]]></mx:Script><mx:Text text="测试用例" id="test" fontSize="12"/><mx:Text text="测试用例" id="test1" fontSize="12"/><mx:Button label="测试按钮" click="init()" /></mx:Application>