Maintain Panel Scroll Position On Partial Postback ASP.NET

<script type="text/javascript">

            // It is important to place this JavaScript code after ScriptManager1

            var xPos, yPos; // Set X and Y positions

            var prm = Sys.WebForms.PageRequestManager.getInstance();

            function BeginRequestHandler(sender, args) {

                if ($get('<%=pnl_memgrid.ClientID%>') != null) {

                    // Get X and Y positions of scrollbar before the partial postback

                    xPos = $get('<%=pnl_memgrid.ClientID%>').scrollLeft;

                    yPos = $get('<%=pnl_memgrid.ClientID%>').scrollTop;

                }

            }

            function EndRequestHandler(sender, args) {

                if ($get('<%=pnl_memgrid.ClientID%>') != null) {

                    // Set X and Y positions back to the scrollbar

                    // after partial postback or full post back

                    $get('<%=pnl_memgrid.ClientID%>').scrollLeft = xPos;

                    $get('<%=pnl_memgrid.ClientID%>').scrollTop = yPos;

                }

            }

            prm.add_beginRequest(BeginRequestHandler);

            prm.add_endRequest(EndRequestHandler);

 </script>