rem: var folderPaneBox = GetFolderOutliner().parentNode; 
add: var folderPaneBox = GetFolderTree().parentNode; 
context: function IsFolderPaneCollapsed(){  var folderPaneBox = GetFolderOutliner().parentNode;  return folderPaneBox.getAttribute("collapsed") == "true"    || folderPaneBox.getAttribute("hidden") == "true";}
meta: 5872	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5872/d38a0937d9c93a0a9d913e2ac781e4328bb8cc73/msgMail3PaneWindow.js/clean/mailnews/base/resources/content/msgMail3PaneWindow.js