handler.call(event.target, event); 
handler.call(element, event) 
    var wrapper = function(event) {      if (event.eventName && event.eventName != eventName)        return false;      Event.extend(event);      handler.call(event.target, event);    };
4053	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/4053/b8ec17fb9a9503b3599947de79d66a077d483799/prototype.js/clean/lib/prototype.js