CalendarExtender

<asp:ScriptManager ID="ScriptManager1" runat="server">

    </asp:ScriptManager>

  

         

        <asp:UpdatePanel ID="UpdatePanel1" runat="server">

            <ContentTemplate>

                DateOne:<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>

                DateTwo:<asp:TextBox ID="TextBox4" runat="server"></asp:TextBox>

                <asp:Image ID="Image2" runat="server" ImageUrl="~/images/book_title.jpg" />

                <cc1:CalendarExtender ID="CalendarExtender1" TargetControlID="TextBox1" PopupPosition="BottomRight" PopupButtonID="Image2" runat="server">

                </cc1:CalendarExtender>

                <cc1:CalendarExtender ID="CalendarExtender3" TargetControlID="TextBox4" PopupPosition="BottomRight" PopupButtonID="Image1" runat="server">

                </cc1:CalendarExtender>

                <asp:Image ID="Image1" runat="server" ImageUrl="~/images/qx.jpg" />

            </ContentTemplate>

        

        </asp:UpdatePanel>