rem: for(var i = 0; i < this.observers.length; i++) if(this.observers[i].element && (this.observers[i].element == element)) this.observers.splice(i,1); 
add: this.observers = this.observers.reject( function(o) { return o.element==element }); 
context:   removeObserver: function(element) {  // element instead of obsever fixes mem leaks    for(var i = 0; i < this.observers.length; i++)      if(this.observers[i].element && (this.observers[i].element == element))        this.observers.splice(i,1);  },
meta: 856	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/856/3f913f897829fb026ef98df2d57f8da94ee5339d/dragdrop.js/buggy/public/javascripts/dragdrop.js