rem: if (event.eventName && event.eventName != eventName) return false; 
add: if (!Event || !Event.extend || (event.eventName && event.eventName != eventName)) return false; 
context:     var wrapper = function(event) {      if (event.eventName && event.eventName != eventName)        return false;            Event.extend(event);      handler.call(element, event)    };
meta: 3332	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/3332/827c8c6b488630d937bfe575db6ff571260fd1c2/event.js/buggy/src/event.js