add: if(!this.active) return; Event.stopObserving(document, "mouseup", this.eventMouseUp); Event.stopObserving(document, "mousemove", this.eventMouseMove); Event.stopObserving(document, "keypress", this.eventKeypress); 
context:   unregisterEvents: function() {    //if(!this.active) return;    //Event.stopObserving(document, "mouseup", this.eventMouseUp);    //Event.stopObserving(document, "mousemove", this.eventMouseMove);    //Event.stopObserving(document, "keypress", this.eventKeypress);  },
meta: 5663	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5663/57687341792749db94b850962ee7ed7f18e1087d/dragdrop.js/clean/manager/media/script/scriptaculous/dragdrop.js