add: dualUseFolders:dualUseFolders, 
context: function CreateNewSubfolder(chromeWindowURL,windowTitle, preselectedMsgFolder){	var preselectedURI;	if(preselectedMsgFolder)	{		var preselectedFolderResource = preselectedMsgFolder.QueryInterface(Components.interfaces.nsIRDFResource);		if(preselectedFolderResource)			preselectedURI = preselectedFolderResource.Value;		dump("preselectedURI = " + preselectedURI + "\n");	}	var dialog = window.openDialog(				chromeWindowURL,				"",				"chrome,titlebar,modal",				{preselectedURI:preselectedURI, title:windowTitle,				okCallback:NewFolder});}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/51fed80933c8f1938efd8079481f5b0e420b2b57/mailCommands.js/buggy/mailnews/base/resources/content/mailCommands.js