Thanks George. The validation will actually be handled by the Format portion of the month... for example, if the user puts in "January 2007" it will automatically convert it to "01/2007." If the user puts in an invalid day/month, it will not accept the value.

That being said, how would I go about programming the form to set a value, depending on the different date which is input in the MonthYear field? I would assume it could be a validation script, pseudo-coded like:

If MonthYear is < 05/2008 then Rate = .348; If MonthYear is > 05/2008 then Rate = .555;
else popup "The date you entered is invalid.";

Thanks again.