<com:TContent ID="Content"> <com:TTextBox ID="t1" /> <com:TRequiredFieldValidator Display="Dynamic" ControlToValidate="t1" FocusOnError="true" ErrorMessage="Error t1" /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <com:TTextBox ID="t2" /> <com:TRequiredFieldValidator Display="Dynamic" ControlToValidate="t2" FocusOnError="true" ErrorMessage="Error t2" /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <com:TButton Text="Submit !" /> </com:TContent>