title: Page cannot load CSS definition for ID html element until F12 Developer Tool opened once
body: <p>I met a problem with my website. I developed my site by ASP .NET. I met _doPostBack problem when using IE10-11 then I fixed it by installing hotfix KB's <a href="http://www.hanselman.com/blog/BugAndFixASPNETFailsToDetectIE10CausingDoPostBackIsUndefinedJavaScriptErrorOrMaintainFF5ScrollbarPosition.aspx" rel="nofollow">hotfix .net _dopostback</a>. Now I met another issue with CSS definition for ID html element. </p>
  
  <p>The website could load the CSS file successful but the definition for ID html element could not be loaded. Just CLASS definitions was loaded.</p>
  
  <p>And after I opened F12 Developer Tool once, it will be OK. </p>
  
  <p>Waiting for your helps.</p>
  
  <p>Thanks in advance!</p>