Flex 遍历(重置)表单

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
<mx:Script>
<![CDATA[
   private function resetForm():void
   {
     var instanceInfo:XML=describeType(this);//通过反射机制取出当前MXML中的信息
     var properties:XMLList =instanceInfo..accessor.(@type=="mx.controls::TextInput")
     for each(var propertyInfo:XML in properties){
       var propertyName:String =propertyInfo.@name;//此处取出的为control的id
       TextInput(this[propertyName]).text="";
     }
   }
]]>
</mx:Script>
<mx:Panel title="用户注册信息" width="359" height="303" x="24.5" y="37" fontSize="12">
<mx:Form >
   <mx:FormHeading label="用户资料" width="100%"/>
   <mx:FormItem label="用户名：" width="100%" required="true">
    <mx:TextInput width="100%" />
   </mx:FormItem>
   <mx:FormItem label="密码：" width="100%" required="true">
    <mx:TextInput width="100%" displayAsPassword="true" />
   </mx:FormItem>
   <mx:FormItem label="性别：" width="100%" direction="horizontal">
    <mx:RadioButton groupName="isMale" label="男" /> <mx:RadioButton groupName="isMale" label="女" />
   </mx:FormItem>
   <mx:FormItem label="邮箱：" width="100%">
    <mx:TextInput width="100%" />
   </mx:FormItem>
   <mx:FormItem label="电话：" width="100%">
    <mx:TextInput width="100%" />
   </mx:FormItem>
   <mx:FormItem label="出生年月：" width="100%">
    <mx:TextInput width="100%" />
   </mx:FormItem>
</mx:Form>
<mx:ControlBar height="32" paddingBottom="0" paddingTop="0" horizontalAlign="center">
   <mx:Button />
   <mx:Button />
</mx:ControlBar>
</mx:Panel>

<mx:StringValidator source="{user_txt}" property="text" minLength="6" maxLength="12" tooShortError="用户名太短了" trigger="{btnSubmit}" triggerEvent="click"/>
<mx:StringValidator source="{pass_txt}" property="text" minLength="6" maxLength="12" trigger="{btnSubmit}" triggerEvent="click"/>
    <mx:PhoneNumberValidator source="{phone_txt}" property="text" trigger="{btnSubmit}" triggerEvent="click"/>
    <mx:DateValidator source="{birth_txt}" property="text" trigger="{btnSubmit}" triggerEvent="click"/>
    <mx:EmailValidator source="{email_txt}" property="text" trigger="{btnSubmit}" triggerEvent="click"/>

</mx:Application>