<div id="tab1">
                            <ul>
                                <asp:Repeater ID="Repeater1" runat="server" OnItemCommand="Repeater1_ItemCommand">
                                <ItemTemplate>
                                 <li>
                                <asp:LinkButton ID="Button1" CommandArgument='<%#Eval("NTID") %>' CommandName="showlist" runat="server" Text='<%#Eval("NTName") %>' /></li>
                                </ItemTemplate>
                                </asp:Repeater>                </ul>
                            </div>
                <asp:UpdatePanel ID="UpdatePanel1" runat="server">
                <ContentTemplate>
                            <div style=" text-align:center;">
                        <div  style=" text-align:center;">
                                <asp:Repeater ID="rptList" runat="server">
                                <ItemTemplate>
                                <div>
                               <div style=" float:left;"><a href='NewsInfo.aspx?NID=<%#Eval("NID") %>'><%#Eval("NName") %></a> </div><div style="float:right;"> <%#Eval("Nsctime") %></div>
                                
                                 </div> <br />                                                            
                                </ItemTemplate>
                                </asp:Repeater>            </div>
                        </div>    
    </ContentTemplate>
                <Triggers><asp:AsyncPostBackTrigger  ControlID="Button1" EventName="Click"/> </Triggers>
                </asp:UpdatePanel>