I am using the "change" event script and it looks like this:if (this.rawValue == "1") { form1.MainPage.MTAIn.MTA-INFundingSubform.MTA-INFundingCheckSub.MTA-INIndSponsTF.mandatory = "error"; form1.MainPage.MTAIn.MTA-INFundingSubform.MTA-INFundingCheckSub.MTA-INIndSponsTF.presence = "visible";}else ...