How to avoid page rendering when loading asp.net page....

<%@ Page Title="" Language="C#" MasterPageFile="~/Student/student.Master" AutoEventWireup="true"
    CodeBehind="AI.aspx.cs" Inherits="Virtual_Classroom.Student.AI" %>

<asp:Content ID="Content1" ContentPlaceHolderID="HeadContent" runat="server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
    <div style="height: 500px; width: 920px; overflow: Auto">
        <asp:DataList ID="DataList1" Visible="true" runat="server" AutoGenerateColumns="false"
            RepeatColumns="2" CellSpacing="5">
            <ItemTemplate>
                <u>
                    <%# Eval("Name") %></u>
                <hr />
                <a class="player" style="height: 300px; width: 445px; display: block" href='<%# Eval("Id", "Handler.ashx?Id={0}") %>'>
                </a>
            </ItemTemplate>
        </asp:DataList>
    </div>
    <script src="FlowPlayer/flowplayer-3.2.12.min.js" type="text/javascript"></script>
    <script type="text/javascript">
        flowplayer("a.player", "FlowPlayer/flowplayer-3.2.16.swf", {
            plugins: {
                pseudo: { url: "FlowPlayer/flowplayer.pseudostreaming-3.2.12.swf" }
            },
            clip: { provider: 'pseudo', autoPlay: false }
        });
    </script>
</asp:Content>