Access to elements in wordpress

[esther]

The following code was added to the foot:

<div id="mc_embed_signup" class="popup_sub">
 <div class="close"></div>
 <form action="http://6thsenseofstyle.us11.list-manage.com/subscribe/post?u=de7f17faa1d129bd23631fd8f&amp;id=f2be059297" method="post" id="mc-embedded-subscribe-form" name="mc-embedded-subscribe-form" class="validate" target="_blank" novalidate>
     <div id="mc_embed_signup_scroll">
      <h1 class="popup_title">6th Sense Of Style Newsletter</h1>
      <div class="popup_border"></div>
      <div class="popup_text">
    <p>Sign up to our newsletter to get the latest articles, lookbooks & street style photography direct to your inbox:</p>
   </div>
   <input type="email" value="" name="EMAIL" class="email" id="mce-EMAIL" placeholder="email address" required>
      <!-- real people should not fill this in and expect good things - do not remove this or risk form bot signups-->
      <div style="position: absolute; left: -5000px;" aria-hidden="true"><input type="text" name="b_de7f17faa1d129bd23631fd8f_f2be059297" tabindex="-1" value=""></div>
      <div class="clear"><input type="submit" value="Subscribe" name="subscribe" id="mc-embedded-subscribe" class="button popup_submit"></div>
     </div>
 </form>
</div>
<script type="text/javascript">
  $('.popup_sub .close').click(function(){
    $('.popup_sub').hide();
  });
setTimeout(function(){

if (!$.cookie('subscribed')) {

$('.popup_sub').show();
  $('.popup_sub form').submit(function(){
    $.cookie('subscribed', true, { 
      expires: 365,
      path: '/'
    });
  });
}

}, 30000);

</script>

In the end, the console gets a mistake "Uncaught TypeError: Cannot read property 'click' of undefined," that's the first line of the code. I tried to get console.log.

[Pearlaqua]

$ is not defined - it's written, you just didn't connect the jQuery library.

Error{
"message": "Uncaught ReferenceError: $ is not defined",
"filename": "http://stacksnippets.net/js",
"lineno": 28,
"colno": 3
}

And, plus, turn everything on the script

$(document).ready(function(){
})