(function($) {

  Drupal.behaviors.app = {
    attach: function (context, settings) {
      amout =  $('.form-item-quantity input', context);
      $('.form-item-quantity input', context).hide();
      $('.form-item-quantity', context).append('<div class="control delete"></div><div class="qty amout">' + $(amout, context).val() + '</div><div class="control add"></div>');

      newCounter =  $('.form-item-quantity .qty.amout', context);

      $('.control.add', context).on('click',function(){
        am = parseInt($(amout).val());
        am++;
        $(amout).val(am);
        $(newCounter).text(am);
      });


      $('.control.delete', context).on('click',function(){
        am = parseInt($(amout).val());
        if(am < 2)
          return false;
        am--;
        $(amout).val(am);
        $(newCounter).text(am);
      });

    }
  };





})(jQuery);