Unfortunately I am using Javascript already.  I don't think you can mix FormCalc and JS.

Thank you so much for the answer.  It worked!

I have 2 date fields on a form.  When I click the submit button I am trying to make sure the end date is after the start date. Here is the code I am using:     var sDate = Date.parse(BackgroundInformation.Background.CheckingDateStart.rawValue);      var eDate = Date.parse(BackgroundInformation.Backg...