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

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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.