you have two options
1] use update panel like:-
<asp:UpdatePanel ID="updpnlRefresh" runat="server" UpdateMode="Conditional">
<ContentTemplate>
//your controls
</ContentTemplate>
</asp:UpdatePanel>
and update it on any action like:- updpnlRefresh.Update()
Or
2] use
MaintainScrollPositionOnPostback="true"
in your aspx page (page directive)
like
<%@ Page Title="Detail" Language="VB" MasterPageFile="~/Site.master"
AutoEventWireup="false" CodeFile="Detail.aspx.vb" Inherits="Detail_Page"
MaintainScrollPositionOnPostback="true" %>