rem: this.offset = [0,1].map( function(i) { return (pointer[i] - pos[i]) }); 
add: function(o) { return o[eventName]; } 
context:       this.offset = [0,1].map( function(i) { return (pointer[i] - pos[i]) });
meta: 1206	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/1206/81ea0800bc8ad92d491743716cd489cad7333723/dragdrop.js/buggy/vendor/rails/actionpack/lib/action_view/helpers/javascripts/dragdrop.js