rem: observerService.AddObserver(messageComposeOfflineObserver, "network:offline-status-changed"); 
add: observerService.addObserver(messageComposeOfflineObserver, "network:offline-status-changed", false); 
context: function AddMessageComposeOfflineObserver(){  var observerService = Components.classes["@mozilla.org/observer-service;1"].getService(Components.interfaces.nsIObserverService);  observerService.AddObserver(messageComposeOfflineObserver, "network:offline-status-changed");    isOffline = ioService.offline;  // set the initial state of the send button  MessageComposeOfflineStateChanged(isOffline);}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/da7e1268bd1d056d9a1cf802e22f3313c5accb15/MsgComposeCommands.js/clean/mailnews/compose/resources/content/MsgComposeCommands.js