rem: Element.Class.remove(drop.element, drop.hoverclass); 
add: if(drop.hoverclass) Element.Class.remove(drop.element, drop.hoverclass); 
context:   deactivate: function(drop) {    Element.Class.remove(drop.element, drop.hoverclass);    this.last_active = null;  },
meta: 2355	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/2355/9867ca01ad65827d23c0bf6cc14d8a64137e927d/dragdrop.js/clean/tracks/public/javascripts/dragdrop.js