if (!xml2htmlStylesheet) {
        $.blockUI({message: 'Ładowanie arkuszy stylów...'});
        $.ajax({
-               url: STATIC_URL + 'xsl/wl2html_client.xsl?20110520',
+               url: STATIC_URL + 'xsl/wl2html_client.xsl?20171106',
                dataType: 'xml',
                timeout: 10000,
                success: function(data) {
                                break;
                        case TEXT_NODE:
                                self.result += text_buffer;
-                               text_buffer = token.node.nodeValue.replace('&', '&').replace('<', '<');
+                               text_buffer = token.node.nodeValue.replace(/&/g, '&').replace(/</g, '<');
                                break;
             case COMMENT_NODE:
                 self.result += text_buffer;