title: Convert jquery to javascript code
body: <p>if you can, please advise me how to:</p>
  
  <ol>
  <li>I need to convert this a nice script, to pure javascript without jquery.</li>
  <li>Very important! The selection area Need to keep aspect ratio.</li>
  </ol>
  
  <p><a href="http://www.script-tutorials.com/html5-image-crop-tool/" rel="nofollow">http://www.script-tutorials.com/html5-image-crop-tool/</a></p>