add: goUpdateCommand("button_goBack"); goUpdateCommand("button_goForward"); 
context:   displayMessageChanged : function(aFolder, aSubject, aKeywords)  {    setTitleFromFolder(aFolder, aSubject);    ClearPendingReadTimer(); // we are loading / selecting a new message so kill the mark as read timer for the currently viewed message    gCurrentMessageUri = gDBView.URIForFirstSelectedMessage;    UpdateStandAloneMessageCounts();    goUpdateCommand("button_junk");  },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/10f4fdd463b3c3b44dfe978b95c71d70b465e536/messageWindow.js/buggy/mail/base/content/messageWindow.js