Get receiver element's id for dragable elements

Get receiver element's id for dragable elements

I want to use .css() to restyle list elements, i have 4 lists, they are connected.
But i need to know where element dropped. I can read where it comes from with this code; ui.sender.attr('id')
How can i now where it dropped?

This is the code if it's necessary;
  1.     $(function() {
  2.         $("#sol, #sag, #orta, #deaktif").sortable({
  3.             opacity: 0.6,
  4.             connectWith: '.bagla',
  5.             scroll: false,
  6.        
  7.         receive: function(event, ui) {
  8.             var ComeID = ui.sender.attr('id');
  9.             alert(ComeID); //just for test
  10.         }
  11.         }).disableSelection();
  12.     });