title: How to check 32bit or 64bit Internet Explorer 10 and 11?
body: <p>Before IE10 (likes IE9), I can use <code>window.navigator.platform</code> to check IE is 32bit or 64bit.   </p>
  
  <p>But for IE10 (IE11), <code>window.navigator.platform</code> always returns 32bit.<br>
  When I open IE11 from <em>C:\Program Files (x86)\Internet Explorer</em>, I saw there is a process <code>IExplorer</code> and another process <code>IExplorer*32</code>.  </p>
  
  <p>If one more tab is opened, another process <code>IExplorer*32</code> is created.<br>
  But it's the same thing when I open IE10 (IE11) from <em>C:\Program Files\Internet Explorer</em>.  </p>
  
  <p>So, I don't know whether IE10 and IE11 has both 32bit and 64bit. Maybe the parent framework is 64bit, and each tab is 32bit.<br>
  Anyone know this?</p>