rem: var buttonName = prefName.substr(this.domain.length+1); 
context:   observe: function(subject, topic, prefName)  {    // verify that we're changing a button pref    if (topic != "nsPref:changed")      return;    var buttonName = prefName.substr(this.domain.length+1);    hideButton(buttonName,pref.getBoolPref(prefName))  }
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/7cccc43f4eb240a738eadbb7ed75ac594b90d5d7/mailWindow.js/buggy/mailnews/base/resources/content/mailWindow.js