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Check if jquery was loaded from CDN

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Check if jquery was loaded from CDN. If not, load it from own website.

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Copy this code and paste it in your HTML 
  1. <script>
  2.   if(typeof window.jQuery === 'undefined') {
  3.     document.write(
  4.       unescape("%3Cscript src='js/jquery.js' type='text/javascript'%3E%3C/script%3E")
  5.     );
  6.   }
  7. </script>

URL: http://habrahabr.ru/post/250663/

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