rem: currentNode === searchInput || 
context: function WhichPaneHasFocus(){  var threadTree = GetThreadTree();  var searchInput = GetSearchInput();  var folderTree = GetFolderTree();  var messagePane = GetMessagePane();      if (top.document.commandDispatcher.focusedWindow == GetMessagePaneFrame())    return messagePane;	var currentNode = top.document.commandDispatcher.focusedElement;		while (currentNode) {    if (currentNode === threadTree ||        currentNode === searchInput ||         currentNode === folderTree ||        currentNode === messagePane)      return currentNode;    					currentNode = currentNode.parentNode;  }		return null;}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/028f46c57e598669cbf0babc0aff895d0d3eb53c/mail3PaneWindowCommands.js/buggy/mailnews/base/resources/content/mail3PaneWindowCommands.js