rem: onError: function(aMessage) {}, 
add: onError: function(aErrNo, aMessage) { var promptService = Components.classes["@mozilla.org/embedcomp/prompt-service;1"] .getService(Components.interfaces.nsIPromptService); promptService.alert(null, 'Error', aMessage); }, 
context:         onError: function(aMessage) {},
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/5be32f4ac6e86923606246ea51a7347e15366191/calendarWindow.js/clean/calendar/resources/content/calendarWindow.js