title: CSS not working when am trying to use update panel in my webpage?
body: <p>i have webpages with master page which contain my css...When i add update panel in content palce holder, css on master page are working fine but same css not working in content page holder.</p>
  
  <pre><code>&lt;%@ Page Title="District Master" Language="C#" MasterPageFile="~/webpages/MasterPage_new.master"
      AutoEventWireup="true" CodeFile="frmDistrict.aspx.cs" Inherits="webpages_frmDistrict" %&gt;
  
  &lt;%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %&gt;
  &lt;asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server"&gt;
      &lt;asp:ScriptManager ID="ScriptManager2" EnablePartialRendering="true" runat="server"&gt;
      &lt;/asp:ScriptManager&gt;
      &lt;div id="main_div"&gt;
          &lt;asp:UpdatePanel ID="uppnl" runat="server" Mode="Conditional"&gt;
              &lt;ContentTemplate&gt;
                  &lt;table style="width: 100%; float: left;"&gt;
                      &lt;tr&gt;
                          &lt;td style="height: 100px; width: 100%; float: left;"&gt;
                              &lt;asp:TextBox ID="txtSearch" runat="server"&gt;&lt;/asp:TextBox&gt;
                              &lt;asp:Button ID="btnSearchOK" runat="server" Text="Ok" Font-Names="Verdana" Font-Size="11px"
                                  Width="6%" Font-Bold="True" OnClick="btnSearchOK_OnClick" /&gt;
                              &lt;asp:Button ID="btnRefresh" runat="server" Text="Refresh" Font-Names="Verdana" Font-Size="11px"
                                  Width="11%" Font-Bold="True" OnClick="btnRefresh_OnClick" /&gt;
                              &lt;asp:Button ID="btnClose" runat="server" Text="Close" Font-Names="Verdana" Font-Size="11px"
                                  Width="9%" Font-Bold="True" OnClick="btnClose_OnClick" /&gt;
                          &lt;/td&gt;
                      &lt;/tr&gt;
                  &lt;/table&gt;
              &lt;/ContentTemplate&gt;
          &lt;/asp:UpdatePanel&gt;
      &lt;/div&gt;
  &lt;/asp:Content&gt;
  </code></pre>