title: parseInt html string value
body: <p>Im trying to perform simple calculations using jQuery but I'm getting NaN as result.</p>
  
  <p>Here is my javascript:</p>
  
  <pre><code>$(document).on('click','.button-group button:not(.done)', function(e){
          e.preventDefault();
          $(this).addClass('active');
          var votevalue = $(this).data('votevalue');
          var image_id = $('.mainimage').data('image_id');
          var votes = $('.mainimage').data('numvotes');
          var totalscore = $('.mainimage').data('totalscore');
              $.ajax({
                  type: 'POST',
                  url: '?a=vote',
                  data: {
                      "votevalue" : votevalue,
                      "image_id" : image_id
                  },
                  success: function(){
                      var votes = parseInt(votes);
                      votes++;
                      var average = ((parseInt(totalscore) + parseInt(votevalue)) / votes);
                      $('#vote-incremenet').html(votes);
                      $('#display-average').html(average);
                      $('#display-average').show();
                      $('.button-group button').addClass('done');
                  }
          }); // end ajax
  }); // end click
  </code></pre>
  
  <p>What am I doing wrong?</p>