view.html.erb

<input type="file" name="fileInput" id="fileInput" />
<script type="text/javascript">
$(document).ready(function() {
  $('#fileInput').fileUpload ({
    'uploader'  : '/uploader.swf',
    'script'    : '/admin/uploadify/create/',
    'cancelImg' : '/images/cancel.png',
    'buttonText': 'Add Photos',
    'auto'      : true,
    'scriptData': {
      session_key: '<%= get_session_key %>'
    }
  });
});
</script>