rem: this.last_active.onDrop(element, this.last_active.element); 
add: this.last_active.onDrop(element, this.last_active.element, event); 
context:   fire: function(event, element) {    if(!this.last_active) return;    Position.prepare();    if (this.isAffected(Event.pointerX(event), Event.pointerY(event), element, this.last_active))      if (this.last_active.onDrop)         this.last_active.onDrop(element, this.last_active.element);  },
meta: 2827	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/2827/7d101d58400acaff232091485c8e140f0a37cbaf/dragdrop.js/clean/actionpack/lib/action_view/helpers/javascripts/dragdrop.js