ASP.NET Server Side Messages & Client Validation Message Handling.

<%@ Page Title="" Language="C#" MasterPageFile="~/Layout.Master" AutoEventWireup="true"
    CodeBehind="MultipleValidationSummaryTest.aspx.cs" Inherits="ValidationMessage.MultipleValidationSummaryTest" %>

<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
    <div id="content" class="round" style="height: 500px">
        <h1>
            Multiple Validation Group Test</h1>
        <br />
        <fieldset>
            <legend>Validation Group 1</legend>
            <table>
                <tr>
                    <td>
                        Required Field
                    </td>
                    <td>
                        <asp:TextBox ID="TextBox1" ValidationGroup="V1" runat="server"></asp:TextBox>
                        <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ErrorMessage="Enter the value of 'Required Field' of Group 1"
                            ControlToValidate="TextBox1" Display="None" ValidationGroup="V1"></asp:RequiredFieldValidator>
                    </td>
                </tr>
                <tr>
                    <td>
                        Range Validator&nbsp;
                    </td>
                    <td>
                        <asp:TextBox ID="TextBox2" runat="server" ValidationGroup="V1"></asp:TextBox>
                        <asp:RangeValidator ID="RangeValidator1" Display="None" ValidationGroup="V1" runat="server"
                            ErrorMessage="Invalid Range of Group 1. Valid [1-1000]" ControlToValidate="TextBox2" MaximumValue="1000"
                            MinimumValue="1" Type="Integer"></asp:RangeValidator>
                    </td>
                </tr>
                <tr>
                    <td>
                        Email Regular Expression Validator
                    </td>
                    <td>
                        <asp:TextBox ID="TextBox3" runat="server" ValidationGroup="V1"></asp:TextBox>
                        <asp:RegularExpressionValidator Display="None" ID="RegularExpressionValidator1" ValidationGroup="V1"
                            ControlToValidate="TextBox3" runat="server" ErrorMessage="Invalid Email of Group 1" ValidationExpression="\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*"></asp:RegularExpressionValidator>
                    </td>
                </tr>
            </table>
            <br />
            <div>
                <center>
                    <asp:Button ID="Button1" ValidationGroup="V1" runat="server" OnClick="Button1_Click"
                        OnClientClick="ValidateJs('V1');" Text="Post" />
                </center>
            </div>
        </fieldset>
        <fieldset>
            <legend>Validation Group 2</legend>
            <table>
                <tr>
                    <td>
                        Required Field
                    </td>
                    <td>
                        <asp:TextBox ID="TextBox4" ValidationGroup="V2" runat="server"></asp:TextBox>
                        <asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ErrorMessage="Enter the value of 'Required Field' of Group 2"
                            ControlToValidate="TextBox4" Display="None" ValidationGroup="V2"></asp:RequiredFieldValidator>
                    </td>
                </tr>
                <tr>
                    <td>
                        Range Validator&nbsp;
                    </td>
                    <td>
                        <asp:TextBox ID="TextBox5" runat="server" ValidationGroup="V2"></asp:TextBox>
                        <asp:RangeValidator ID="RangeValidator2" Display="None" ValidationGroup="V2" runat="server"
                            ErrorMessage="Invalid Range of Group 2. Valid [1-1000]" ControlToValidate="TextBox5" MaximumValue="1000"
                            MinimumValue="1" Type="Integer"></asp:RangeValidator>
                    </td>
                </tr>
                <tr>
                    <td>
                        Email Regular Expression Validator
                    </td>
                    <td>
                        <asp:TextBox ID="TextBox6" runat="server" ValidationGroup="V2"></asp:TextBox>
                        <asp:RegularExpressionValidator Display="None" ID="RegularExpressionValidator2" ValidationGroup="V2"
                            ControlToValidate="TextBox6" runat="server" ErrorMessage="Invalid Email of Group 2" ValidationExpression="\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*"></asp:RegularExpressionValidator>
                    </td>
                </tr>
            </table>
            <div>
                <center>
                    <asp:Button ID="Button2" ValidationGroup="V2" runat="server" OnClick="Button1_Click" OnClientClick="ValidateJs('V2');"
                        Text="Post" />
                </center>
            </div>
        </fieldset>
    </div>
</asp:Content>