function zf_iframe(options) {
    var jQuery;

    if (window.jQuery === undefined || window.jQuery.fn.jquery !== '3.3.1') {
        var script_tag = document.createElement('script');
        script_tag.setAttribute("type","text/javascript");
        script_tag.setAttribute("src",
            "https://code.jquery.com/jquery-3.3.1.min.js");
        if (script_tag.readyState) {
            script_tag.onreadystatechange = function () { // For old versions of IE
                if (this.readyState == 'complete' || this.readyState == 'loaded') {
                    scriptLoadHandler();
                }
            };
        } else { // Other browsers
            script_tag.onload = scriptLoadHandler;
        }
        (document.getElementsByTagName("head")[0] || document.documentElement).appendChild(script_tag);
    } else {
        jQuery = window.jQuery;

        main(options);
    }

    function scriptLoadHandler() {
        jQuery = window.jQuery.noConflict(true);
        main(options);
    }

    function main(options) {
        jQuery(document).ready(function($){
            var settings = $.extend({
                selector: '#zf_iframe'
            }, options);

            // var homeURL = 'https\u003A\/\/zeugnisfairness.de\/widget\/w_5fe48406eb2654f11f95eaab99856acb003a06ab2f927f413581b63c16e151b8';
            var homeURL = '\/\/www.zeugnisfairness.de\/widget\/w_5fe48406eb2654f11f95eaab99856acb003a06ab2f927f413581b63c16e151b8';
                                         
            var iframe = $('<iframe>', {
                src: homeURL,
                frameborder: 0,
                scrolling: 0,                
                style: 'border: 0px dashed #004562;',                
                height: 575,
                width: 525
            });

            var $container = $(settings.selector);
            
            iframe.appendTo(settings.selector);

            // $.getJSON(homeURL + 'initial.json', function(response) {
            //     $container.append(response.html);
            // });
        });
    }
}