<td>
                                                        <asp:TextBox ID="txt_Arrivo" runat="server" AutoCompleteType="Disabled" 
                                                            AutoPostBack="True" EnableClientScript="False" Font-Size="8pt" 
                                                            style="text-align: center" ValidationGroup="Arrivi" Width="80px"></asp:TextBox>
                                                        <ajaxToolkit:MaskedEditExtender ID="txt_Arrivo_MaskedEditExtender" 
                                                            runat="server" CultureAMPMPlaceholder="" CultureCurrencySymbolPlaceholder="" 
                                                            CultureDateFormat="" CultureDatePlaceholder="" CultureDecimalPlaceholder="" 
                                                            CultureName="it-IT" CultureThousandsPlaceholder="" CultureTimePlaceholder="" 
                                                            Enabled="True" ErrorTooltipEnabled="True" Mask="99/99/9999" MaskType="Date" 
                                                            TargetControlID="txt_Arrivo" UserDateFormat="DayMonthYear">
                                                        </ajaxToolkit:MaskedEditExtender>
                                                        <ajaxToolkit:CalendarExtender ID="txt_Arrivo_CalendarExtender" runat="server" 
                                                            Enabled="True" Format="dd/MM/yyyy" PopupButtonID="imgb_Arrivo" 
                                                            TargetControlID="txt_Arrivo">
                                                        </ajaxToolkit:CalendarExtender>
                                                    </td>