function WhichPaneHasFocus(){  var threadTree = GetThreadTree();  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 === folderTree ||        currentNode === messagePane)      return currentNode;    					currentNode = currentNode.parentNode;  }		return null;}
5459	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/5459/634044202ad0e89ed5e63759bb283c8d4f090335/mail3PaneWindowCommands.js/buggy/mail/base/content/mail3PaneWindowCommands.js