RequiredFieldValidators - how to require that 1 of 2 questions be answered

Is there a way using the built-in validators in ASP.NET (Visual Studio .NET 2003) to have a validator require that one of two fields be filled in (but not both)?
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sah18Asked:
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naveenkohliCommented:
No, you can't do it with built-in validators. But you can always write custom validator or do client side validation yourself.
See the following link.. It shows how custom validation can be added for any kind of control.

http://www.netomatix.com/Development/DropDownCustomValidator.aspx
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sah18Author Commented:
This is very helpful.  Thank you for your quick response!
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