<%@ page language="C#" %> <script runat="server"> </script> <html> <head runat="server"> <title>Untitled Page</title> </head> <body> <form runat="server"> <h1>First form</h1> <asp:textbox id="TextBox1" runat="server" validationgroup="firstform"> </asp:textbox> <asp:requiredfieldvalidator id="RequiredFieldValidator1" runat="server" display="Dynamic" setfocusonerror="True" validationgroup="firstform" controltovalidate="TextBox1">***</asp:requiredfieldvalidator> <br /> <br /> <asp:button id="Button1" runat="server" validationgroup="firstform" text="Submit" /> <h1>Second form</h1> <asp:textbox id="TextBox2" runat="server" validationgroup="secondform"> </asp:textbox> <asp:requiredfieldvalidator id="RequiredFieldValidator2" runat="server" display="Dynamic" setfocusonerror="True" validationgroup="secondform" controltovalidate="TextBox2">***</asp:requiredfieldvalidator> <br /> <br /> <asp:button id="Button2" runat="server" validationgroup="secondform" text="Submit" /> </form> </body> </html>