flags in flex regexpvalidator

can 开发者_JS百科anyone please explain me what is the use of flag variable in the flex RegExpValidator. what I am to do is to create a validator that can provide variety of error messages as in EmailValidator

These have nothing to do with output messages. It's to specify the behavior of the regexp matcher. Here is the list of available flags: http://help.adobe.com/en_US/as3/dev/WS5b3ccc516d4fbf351e63e3d118a9b90204-7ea7.html

If you want to build a more complex validator you'll have to extend Validator from scratch.