rem: isOffline = ioService.offline; 
add: gIsOffline = gIOService.offline; 
context: function AddMessageComposeOfflineObserver(){  var observerService = Components.classes["@mozilla.org/observer-service;1"].getService(Components.interfaces.nsIObserverService);  observerService.addObserver(messageComposeOfflineObserver, "network:offline-status-changed", false);    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/2006/9421/6d52592e83bce2a07c0c6646de9e9c15df155849/MsgComposeCommands.js/buggy/mailnews/compose/resources/content/MsgComposeCommands.js