출처 : http://livedocs.adobe.com/flex/3/html/help.html?content=validators_5.html
Ex)
<?xml version="1.0"?>
<!-- validators\PNValidatorErrMessageStyle.mxml -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
<!-- Use blue for the error message. -->
<mx:Style>
.errorTip { borderColor: #0000FF}
</mx:Style>
<!-- Define the PhoneNumberValidator. -->
<mx:PhoneNumberValidator id="pnV"
source="{phoneInput}" property="text"
wrongLengthError="Please enter a 10-digit number."/>
<!-- Define the TextInput control for entering the phone number. -->
<mx:TextInput id="phoneInput"/>
<mx:TextInput id="zipCodeInput"/>
</mx:Application>
