https://www.energieforschung.de/c_media/js/PhotoSwipe/photoswipe-autoloader.js

1if (!window.PhotoSwiperAutoloader) {
2        window.PhotoSwiperAutoloader = true;
3        var url = "";
4        // parse arguments
5        var scripts = document.getElementsByTagName('script');
6        var index = scripts.length - 1;
7        var autoloaderScript = scripts[index];
8        var language = $("meta[name=language]").attr('content');
9        $(function () {
10            if ($(".photoswipe-open")[0] || $(".photoswipe-gallery-open")[0] || $(".photoswipe-open-single-image")[0]) {
11                url = autoloaderScript.src.replace("photoswipe-autoloader.js", "").replace(/\?.*/, '');
12                $.getScript(url+"photoswipe.min.js", function success1() {
13                    $.getScript(url+"photoswipe-ui-default.min.js", function success2() {
14                        $.getScript(url+"jquery.getCSSLazy.js", function success3() {
15                            jQuery.getCSSLazy(url+'photoswipe.min.css');
16                            jQuery.getCSSLazy(url+'default-skin.min.css');
17                                $.getScript(url+"photoswipe-translation.js", function success4() {
18                                    $.getScript(url + "photoswipe-html.js", function success5() {
19                                        $("body").append(photoSwipeHtml(photoSwipeTranslation(language)));
20                                        $.getScript(url + "photoswipe-includer.js");
21                                    });
22                                });
23                        });
24                    });
25                });
26            }
27        });
28}