title: ASP.NET fails to detect IE10 causing _doPostBack is undefined JavaScript error
body: <p>ASP.NET fails to detect IE10 causing the following error:</p>
  
  <blockquote>
    <p><code>_doPostBack</code> is undefined JavaScript error</p>
  </blockquote>
  
  <p>or maintain FF5 scrollbar position.</p>
  
  <p>There is a bug in the browser definition files that shipped with .NET 2.0 and .NET 4, namely that they contain definitions for a certain range of browser versions. But the versions for some browsers (like IE 10) aren't within those ranges any more. Therefore, ASP.NET sees them as unknown browsers and defaults to a down-level definition, which has certain inconveniences, like that it does not support features like JavaScript.</p>
  
  <p>The fix available at <a href="http://support.microsoft.com/kb/2600100" rel="noreferrer">http://support.microsoft.com/kb/2600100</a> for Win7 SP1, is not working for me. Please help me on this. 
  My working environment is:</p>
  
  <p>.NET Framework 3.5 SP1, Windows Server 2003</p>