title: 'Page_IsValid' is undefined IE 11
body: <p>In IE 11, ASP.Net 4.0 client side validation not working. Same working for other browsers.
  'Page_IsValid' is undefined
  'Page_ClientValidate' is undefined</p>
  
  <p>When I check the generated page source, the ScriptResource.axd is not registered in IE.</p>
  
  <p>Any ideas on this?</p>