<asp:Panel ID="pan_Presenti" onscroll="getScroll('pan_Presenti','HF_scroll_Hor','HF_scroll_Ver')"
                                                runat="server" 
                                                Height="400px" 
                                                ScrollBars="Vertical"
                                                Width="440px">
                                            <!-- GRIGLIA PRESENTI -->
                                            <asp:GridView ID="gw_In_Albergo" 
                                                    runat="server" 
                                                    AutoGenerateColumns="False" 
                                                    BackColor="#FFE3AA" BorderColor="Tan" BorderWidth="1px" 
                                                    CellPadding="2" EmptyDataText="Nessun movimento visualizzato" Font-Bold="False" 
                                                    Font-Names="Arial" Font-Size="7pt" ForeColor="Black" GridLines="None" Width="420px" 
                                                    PageSize="15" style="text-align: left" EnableModelValidation="True">
                                                <FooterStyle BackColor="Tan" />
                                                <SelectedRowStyle BackColor="DarkSlateBlue" ForeColor="GhostWhite" />
                                                <PagerStyle BackColor="PaleGoldenrod" ForeColor="DarkSlateBlue" 
                                                        HorizontalAlign="Center" />
                                                <HeaderStyle  BackColor="#A55129" Font-Bold="False" ForeColor="White"/>
                                                <AlternatingRowStyle BackColor="#EBF7FC" />
                                                <Columns>
                                                    <asp:TemplateField>
                                                        <ItemTemplate>
                                                            <asp:CheckBox ID="chk_Seleziona_Schedina" 
                                                                    runat="server" AutoPostBack="True" OnCheckedChanged="chk_Seleziona_Schedina_OnCheckedChanged"/>
                                                        </ItemTemplate>
                                                    </asp:TemplateField>
                                                    <asp:TemplateField>
                                                        <ItemTemplate>
                                                            <asp:Image ID="Image4" runat="server" ImageUrl="~/Immagini/kuser.png" />
                                                        </ItemTemplate>
                                                    </asp:TemplateField>
                                                    <asp:BoundField DataField="Cognome" HeaderText="Cognome" />
                                                    <asp:BoundField DataField="Nome" HeaderText="Nome" />
                                                    <asp:BoundField DataField="DataArrivo" HeaderText="Arrivo" >
                                                    <HeaderStyle HorizontalAlign="Center" />
                                                    </asp:BoundField>
                                                    <asp:BoundField DataField="DataPartenza" HeaderText="Partenza" />
                                                    <asp:BoundField DataField="ProvinciaResidenzaDescrizione" 
                                                            HeaderText="Provincia" />
                                                    <asp:BoundField DataField="StatoResidenzaDescrizione" 
                                                            HeaderText="Regione/Nazione" />
                                                </Columns>
                                            </asp:GridView>
                                        </asp:Panel>
<!-- Definisco due hidden field dove memorizzerò rispettivamente 
    -- il valore dello sroll Orizzontale e Verticale --> 
  <asp:HiddenField ID="HF_scroll_Hor" runat="server" /> 
  <asp:HiddenField ID="HF_scroll_Ver" runat="server" />
    <script type="text/javascript">
        function setScroll(PanelID, HiddenFieldID1, HiddenFieldID2) {
            if (document.getElementById(PanelID) != null
         && document.getElementById(HiddenFieldID1) != null
         && document.getElementById(HiddenFieldID2) != null) {
                document.getElementById(PanelID).scrollLeft = document.getElementById(HiddenFieldID1).value;
                document.getElementById(PanelID).scrollTop = document.getElementById(HiddenFieldID2).value;
            }
        }

        function getScroll(PanelID, HiddenFieldID1, HiddenFieldID2) {
            if (document.getElementById(PanelID) != null
         && document.getElementById(HiddenFieldID1) != null
         && document.getElementById(HiddenFieldID2) != null) {
                document.getElementById(HiddenFieldID1).value = document.getElementById(PanelID).scrollLeft;
                document.getElementById(HiddenFieldID2).value = document.getElementById(PanelID).scrollTop;
            }
        }
        setScroll('<%= pan_Presenti.ClientID %>', '<%= HF_scroll_Hor.ClientID %>', '<%= HF_scroll_Ver.ClientID %>');
  </script>