form的使用

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" xmlns:ns1="*">
    <mx:Panel x="10" y="10" width="288" height="343" layout="absolute">
        <mx:Form x="10" y="10" width="253" height="247" id="form1" label="form1">
            <mx:FormHeading label="用户资料" width="157">
                
            </mx:FormHeading>
            <mx:FormItem label="用户名" required="true">
                <mx:TextInput id="user_txt"/>
            </mx:FormItem>
            <mx:FormItem label="密码" required="true">
                <mx:TextInput displayAsPassword="true" id="password_txt"/>
            </mx:FormItem>
            <mx:FormItem label="姓别" direction="horizontal" horizontalAlign="right">
                <mx:RadioButton groupName="isMale" label="女"/>
                <mx:RadioButton groupName="isMale" label="男"/>
            </mx:FormItem>
            <mx:FormItem label="邮箱">
                <mx:TextInput id="email_txt"/>
            </mx:FormItem>
            <mx:FormItem label="电话">
                <mx:TextInput id="phone_txt"/>
            </mx:FormItem>
            <mx:FormItem label="出生年月">
                <mx:TextInput id="birth_txt"/>
            </mx:FormItem>
        </mx:Form>
        <mx:ControlBar horizontalAlign="center">
            <mx:Button label="确定"/>
            <mx:Button label="重写"/>
        </mx:ControlBar>
    </mx:Panel>
    <mx:StringValidator source="{user_txt}" property="text" minLength="6" maxLength="12" tooShortError="用户名太短了" tooLongError="用户名太长了"></mx:StringValidator>
    <mx:StringValidator source="{password_txt}" property="text" minLength="6" maxLength="12"></mx:StringValidator>
    <mx:EmailValidator source="{email_txt}" property="text"></mx:EmailValidator>
    <mx:DateValidator source="{birth_txt}" property="text"></mx:DateValidator>
    <mx:PhoneNumberValidator source="{phone_txt}" property="text"></mx:PhoneNumberValidator>
</mx:Application>