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: 6601	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/6601/28b3187d07d97712c23182569a4d6fd00900b5f7/dragdrop.js/buggy/javascript/script.aculo.us/dragdrop.js