rem: onError: function(aErrNo, aMessage) { var promptService = Components.classes["@mozilla.org/embedcomp/prompt-service;1"] .getService(Components.interfaces.nsIPromptService); promptService.alert(null, 'Error', aMessage); }, 
add: onError: function(aErrNo, aMessage) {}, 
context:         onError: function(aErrNo, aMessage) {            var promptService = Components.classes["@mozilla.org/embedcomp/prompt-service;1"]                                          .getService(Components.interfaces.nsIPromptService);            promptService.alert(null, 'Error',                                aMessage);        },
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/02cbbd5cccb02177c5bd9e651439423219ada230/calendarWindow.js/buggy/calendar/resources/content/calendarWindow.js