title: "Script Error encountered", "'__doPostBack' is undefined" in Internet Explorer 11
body: <p>Getting issue of '<strong>__doPostBack</strong>' is undefined" in Internet Explorer 11(<strong>.net version 4.0</strong>) . I already install App_Browser Update of IE &amp; site works perfectly on IE10 &amp; its lover versions. this issue comes on IE11.</p>
  
  <p>I follow this link for changes</p>
  
  <p><strong><a href="http://www.telerik.com/community/forums/aspnet-ajax/general-discussions/incorrectly-rendered-webpage-when-using-internet-explorer-11.aspx" rel="nofollow">http://www.telerik.com/community/forums/aspnet-ajax/general-discussions/incorrectly-rendered-webpage-when-using-internet-explorer-11.aspx</a></strong></p>
  
  <p><strong><a href="http://help.ablecommerce.com/index.htm#upgrades/ac7_aspnet/tech_bulletins/asp.net_4.0_with_ie_11.htm" rel="nofollow">http://help.ablecommerce.com/index.htm#upgrades/ac7_aspnet/tech_bulletins/asp.net_4.0_with_ie_11.htm</a></strong></p>
  
  <p>Now Site working perfectly on Local(<strong>Windows7 with IE11 browser</strong>) no issue comes but when site is loaded on Server(<strong>Windows Server 2003 R2</strong>) that issue is still persists. I also installed Server Updates for IE11 fix .</p>
  
  <p>Follow link for Server Update : <strong><a href="http://support.microsoft.com/kb/2836939/en-us" rel="nofollow">http://support.microsoft.com/kb/2836939/en-us</a></strong></p>
  
  <p>But no changes reflected please give suggestion for provided issues. </p>