title: addClass append every time in every Clone
body: <p>This is my script</p>
  
  <pre><code> var newclass = 0;
  
   jQuery("#addexperience").click(function(){
      $("#expclone").clone().find("input:text").val("").end().prependTo( ".exp_clone" );
      $(".ongoing").each(function(){
          $(".ongoing").addClass("newclass"+newclass);
          newclass++;
      });
   });
  </code></pre>
  
  <p>I am tring to clonning a perticular div, and add an class on clone element.
  but addClass append every time, </p>
  
  <p>means in first clone it added:  newclass1, in second clone it added: newclass1 newclass2; so on..</p>
  
  <p>i want only newclass2 in second clone, and newclass3 in thire clone and so on..</p>