rem: this.observers.each( function(o) { if(o[eventName]) o[eventName](eventName, draggable, event); }); 
add: this.observers = this.observers.reject( function(o) { return o.element==element }); 
context:       this.observers.each( function(o) {        if(o[eventName]) o[eventName](eventName, draggable, event);      });
meta: 6359	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/6359/52d313976f72b3f30c833a7675d476a595bc284d/dragdrop.js/buggy/web/js/dragdrop.js