issue 846 : modify javascript to support new specification.

git-svn-id: http://xe-core.googlecode.com/svn/branches/1.5.0@9805 201d5d3c-b55e-5fd7-737f-ddc643e51545

modules/importer/importer.admin.controller.php

@@ -23,6 +23,8 @@
 		 * @brief Check whether the passing filename exists or not. Detect the file type, too.
 		 */
 		function procImporterAdminCheckXmlFile() {
+			global $lang;
+
 			$filename = Context::get('filename');
 			$isExists = 'false';