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<%@ Page language="VB" ClientTarget="DownLevel" %>
<script language="VB" runat="server">
Sub Page_Load()
    If Page.IsPostBack Then
        Validate()
        
        If Not IsValid Then
            If Not age_required.IsValid Then
                errorMessage.Text = age_required.ErrorMessage & "<br>"
            ElseIf Not age_range.IsValid Then
                errorMessage.Text = age_range.ErrorMessage & "<br>"
            End If
        End If
    End If
End Sub
</script>
<HTML>
    <HEAD>
        <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
    </HEAD>
    <body>
        <form method="post" runat="server">
            <asp:Label ID="errorMessage" Runat="server"></asp:Label>
            <table>
                <tr>
                    <td>
                        Age:
                    </td>
                    <td>
                        <asp:textbox runat="Server" columns="6" id="age"></asp:textbox>
                    </td>
                    <td>
                        <asp:requiredfieldvalidator runat="Server" id="age_required" controltovalidate="age" display="dynamic" errormessage="Age is required." EnableClientScript="False">
                            *
                        </asp:requiredfieldvalidator>
                        <asp:rangevalidator runat="Server" id="age_range" controltovalidate="age" display="dynamic" errormessage="Age must be an integer between 18 and 65." minimumvalue="18" maximumvalue="65" Type="Integer" EnableClientScript="False">
                        *
                        </asp:rangevalidator>
                    </td>
                </tr>
            </table>
            <asp:button id="save_button" runat="Server" text="Save"></asp:button>
        </form>
    </body>
</HTML>