<tr>
    <td colspan="3" style="padding-top:5px;">
        <table border="0" cellpadding="0" cellspacing="0" width="100%">
            <tr>
                <td align="center" valign="top">
                    <asp:UpdatePanel ID="UpdatePanel2" runat="server" UpdateMode="Conditional">
                        <ContentTemplate>
                            <asp:LinkButton ID="btnOk" runat="server"  Height="25px" style="margin-top : 10px;"
                                Width="100px" CssClass="buttons"  >تأیید</asp:LinkButton>
                            <div id="divProgressOkButton" style="width:40px; height:40px; vertical-align:middle; text-align:center;">
                            <asp:UpdateProgress ID="UpdateProgressOkButton" runat="server" AssociatedUpdatePanelID="UpdatePanel2">
                                <ProgressTemplate>
                                    <asp:Image ID="Image3" runat="server" ImageUrl="~/images/loading1.gif" Width="40px" Height="40px"/>
                                </ProgressTemplate>
                            </asp:UpdateProgress>
                            </div>
                            <asp:Label ID="lblMessage" runat="server" Text=""></asp:Label>
                        </ContentTemplate>
                    </asp:UpdatePanel> 
                </td>
                <td align="left" valign="top" width="70px">
                    <asp:LinkButton ID="btnBack" runat="server"  Height="35px" style="position:relative; top: 0px; right: 0px;"
                        Width="70px" CssClass="backbutton"></asp:LinkButton>
                </td>
            </tr>
        </table>
    </td>
</tr>