title: FileReader and JSON objects not defined in ie11
body: <p>Whenever trying to open a page running a javascript code using FileReader and JSON upon page initialization, ie11 reports "FileReader is not defined", and later "JSON is not defined". The head of HTML file is as follows:</p>
  
  <pre><code>&lt;!DOCTYPE html&gt;
  &lt;html&gt;
  &lt;head&gt;
  &lt;meta charset="UTF-8"&gt;
  &lt;title&gt;LogViewer&lt;/title&gt;
  &lt;link rel="stylesheet" href="http://code.jquery.com/ui/1.10.3/themes/smoothness/jquery-ui.css" /&gt;
  &lt;link rel="stylesheet" href="css/slick.grid.css" type="text/css"/&gt;
  &lt;link rel="stylesheet" type="text/css" href="css/style.css" /&gt;
  &lt;script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js" type="text/javascript"&gt;&lt;/script&gt;
  &lt;script src="http://code.jquery.com/ui/1.10.3/jquery-ui.js" type="text/javascript"&gt;&lt;/script&gt;
  &lt;/head&gt;
  </code></pre>
  
  <p>Everything works fine in FF and Chrome. Any ideas?</p>