How do I keep the Ajax data on the screen after a initial flash in ASP.net

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ASP.NET

Ajax

jQuery

The posting of the data always flashes the correct data but it does not stay in the div. I tried putting "return false;" that did not work. I think it has to do with the "runat='server'" in ASP.net.

How do I keep the Ajax data on the screen after a initial correct flash?

<script type="text/javascript" src="http://code.jquery.com/jquery-latest.js"></script>
<script type="text/javascript">
    $(function () {
        $("#<%= Button1.ClientID %>").bind("click", fromServer)
    });
    function fromServer() {
        $.ajax({
            type: "GET",
            url: "textFromServer.txt",
            success: postToPage
        });
    }
    function postToPage(data, status){
        $('#servertext').text(data);
    }
</script>
<asp:Button ID="Button1" runat="server" Text="Get Text" /><br />
<div id="servertext"></div>