Showing a hidden div once the user has voted?

I have a div which is initially hidden and I want it to show once the user has voted and the results are shown. I want the hidden div to append to #polls-1. Normally, I would just use the poll templates in the admin section, but the content that I am trying to append is a php statement which calls for a contact form (Contact Form 7). So since I can’t insert shortcodes or anything but HTML into the poll templates, I had to resort to other methods.

So far, I have this, but it’s not working. When the user clicks on the vote button (.Buttons), the div .comment-block is supposed to get cloned and appended to #polls-1. If anybody can help me out, I’d really appreciate it.

$('.Buttons').on('click', function () {
	  var commentBlock = $('.comment-block'),
		cloneComment = $('.comment-block').clone();
		commentBlock.remove();
	  $('#polls-1').append('.comment-block').show();
	});

<div id="polls-1">
    (poll here) + .Buttons vote button                  <-- in here----------|
</div>                                                                       |
<div class="comment-block" style="display:none">        <-- I want this div  |
    <?php echo do_shortcode('[contact-form-7]'); ?>
</div>

https://wordpress.org/plugins/wp-polls/