<%@ Page Language="VB" %>
<script runat="server">
sub Submit(obj as object, e as eventargs)
if Page.IsValid then
lblMessage.Text = "Success!"
else
lblMessage.Text = "One of the fields is invalid1"
end if
end sub
</script>
<html><body>
<form runat="server">
<asp:Label id="lblMessage" runat="server" /><br>
<asp:Panel id="Panel1" runat="server">
<table>
<tr>
<td>
First and last name:
</td>
<td>
<asp:TextBox id="tbFName" runat="server" />
<asp:TextBox id="tbLName" runat="server" />
<asp:RequiredFieldValidator runat="server"
ControlToValidate="tbFName"
ErrorMessage="First name required"
Display="dynamic"/>
<asp:RequiredFieldValidator runat="server"
ControlToValidate="tbLName"
ErrorMessage="Last name required"
Display="dynamic"/>
</td>
</tr>
<tr>
<td>
<asp:Button id="btSubmit" runat="server"
text="Add"
OnClick="Submit" />
</td>
</tr>
</table>
</asp:Panel>
</form>
</body></html>