Edit in JSFiddle

$(document).ready(function() {
   $('#btn-example-file-reset').on('click', function(e) {
      var $el = $('#example-file');
      $el.wrap('<form>').closest('form').get(0).reset();
      $el.unwrap();
   });
});

<h3><a href="http://www.gyrocode.com/articles/how-to-reset-file-input-with-javascript/">How to reset file input with JavaScript</a></h3>
<a href="http://www.gyrocode.com/articles/how-to-reset-file-input-with-javascript/">See full article on Gyrocode.com</a>
<hr><br>

<form id="frm-example" name="frm-example">
   <p>
      <label>Name</label><br>
      <input value="John Doe" type="text">
   </p>
   <p>
      <label>File</label><br>
      <input id="example-file" type="file">
   </p>
   <p>
      <button id="btn-example-file-reset" type="button">Reset file</button>
   </p>
</form>