.disabled = false;
                }
            }

            function loadFile(event, fname) {
                var file = event.target.files[0] || null;
                if (file == null) {
                    return;
                }

                printTextarea("loadFile: loading model: " + file.name + ", size: " + file.size + " bytes");
                printTextarea('loadFile: please wait ...');

                var reader = new FileReader();
                reader.onload = function(event) {
       