rem: var prefs = Components.classes["component: 
add: var prefs = Components.classes["@mozilla.org/preferences;1"].getService(Components.interfaces.nsIPref); 
context: function setHomePageToDefaultPage(folderFieldId){  var homePageField = document.getElementById(folderFieldId);  var prefs = Components.classes["component://netscape/preferences"].getService(Components.interfaces.nsIPref);  var url = prefs.CopyDefaultCharPref("mailnews.start_page.url");  homePageField.value = url;}
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/0257791053c2b38e1dfaf2ee11afae973e82e394/pref-mailnews.js/clean/mailnews/base/prefs/resources/content/pref-mailnews.js