           var key = row.substring(0, index).trim();
                    var value = row.substring(index + 1).trim();
                    if (key.length > 0) {
                        params.set(key, value);
                    }
                }
            }
            return params;
        }
        function doPreprocessing() {
            var xslt = document.getElementById("preprocessor-xslt").value;
            var xml = document.getElementById("input-xml").value;
            var result = transform(