<script type="text/javascript" charset="utf-8">
 
  $(document).ready(function() {
 
    // Hide the submit button
    $('#ls-button-submit').hide();
 
    // Listener on the yes/no answers
    $('#question{QID} input:radio').on('change', function(e) {
      if($('#question{QID} input:radio:checked:eq(0)').val() == 'Y') {
        $('#ls-button-submit').fadeIn(500);
      }
      else {
        $('#ls-button-submit').fadeOut(500);
      }
    });
  });  
</script>