rem: if(this.last_active) this.deactivate(this.last_active); 
context:   activate: function(drop) {    if(this.last_active) this.deactivate(this.last_active);    if(drop.hoverclass)      Element.Class.add(drop.element, drop.hoverclass);    this.last_active = drop;  },
meta: 3991	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/3991/d29159eae8749c508d01bb447868321a3ba6bbfa/dragdrop.js/buggy/manager/media/script/scriptaculous/dragdrop.js