.textContent = 'Loading…';

            pre.appendChild(code);

            var xhr = new XMLHttpRequest();

            xhr.open('GET', src, true);

            xhr.onreadystatechange = function () {
                if (xhr.readyState == 4) {

                    if (xhr.status < 400 && xhr.responseText) {
                        code.textContent = xhr.responseText;

                        Prism.highlightElement(code);
                    }
                    else if (xhr.status >= 400) {
             