<asp:ScriptManager ID="scrMngr" runat="server"></asp:ScriptManager>
    <asp:UpdatePanel ID="upnlCon" runat="server">
        <Triggers>
            <asp:AsyncPostBackTrigger ControlID="btnAddNotat" />
            <asp:AsyncPostBackTrigger ControlID="btnRedigerNotat" />
            <asp:AsyncPostBackTrigger ControlID="btnHentNotat" />
        </Triggers>
        <ContentTemplate>

        </ContentTemplate>
    </asp:UpdatePanel>