rem: var observerSvc = Cc["@mozilla.org/observer-service;1"]. getService(Ci.nsIObserverService); 
add: var observerSvc = Components.classes["@mozilla.org/observer-service;1"] .getService(Components.interfaces.nsIObserverService); 
context: function imipOnLoad(){    var listener = {};    listener.onStartHeaders = onImipStartHeaders;    listener.onEndHeaders = onImipEndHeaders;    gMessageListeners.push(listener);    // Set up our observers    var observerSvc = Cc["@mozilla.org/observer-service;1"].                      getService(Ci.nsIObserverService);    observerSvc.addObserver(onItipItem, "onItipItemCreation", false);}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/10234/6b4d8f96f4092c4d68b93256700b25be955d0946/imip-bar.js/clean/calendar/lightning/content/imip-bar.js