get class count in jquery
// Gets the number of elements with class yourClass var numItems = $('.yourclass').length
Source: stackoverflow.com
count div class in div jquery
<div class="wrapper"> <div class="item"></div> <div class="item"></div> <div class="item"></div> <div class="item"></div> <div class="item"></div> </div> <script> alert($('.wrapper').children('.item').length) </script>