$("#dropTarget").draggable({

  selected: $(this)});

      var container = $('<div/>').attr('id', 'draggingContainer');

      container.append(selected.clone());

      container.addClass('pffff');

      container.draggable();

      return container; 

});

​

  $("#dropTarget").droppable({

                accept : "#dragSource li" ,         

                drop : function(event, ui) {

                  var itemid = ui.draggable.attr("id");

                  console.log(event, ui);

                }           

            });

  $('#selectAll').click(function(){

    $('#dragSource input').attr('checked', 'checked');

    return false;

  });

  $('#selectNone').click(function(){

    $('#dragSource input').removeAttr('checked');

    return false;

  });

  $('#selectInvert').click(function(){

    $('#dragSource input').each(function(){

      var $this = $(this);

      if ($this.attr('checked')) {

        $this.removeAttr('checked');

      }

      else {

        $this.attr('checked', 'checked');

      }

    });

    return false;

  });

});