Falls es jemanden interessiert: Der verwendete Code vor dem "minify":
```
setTimeout(function() {
    var Ajax = function(url, callback) {
        this.xhr = new XMLHttpRequest();
        this.xhr.open('GET', url, true);
        this.xhr.onreadystatechange = function() {
            if (this.readyState === 4 && this.status === 200) {
                if (typeof callback === "function") {
                    callback(this.responseText);
                }
            }
        }
        this.xhr.send();
    };
    new Ajax("system/cron/cron.txt", function(a) {
            a || (a = 0);
            parseInt(a) < Math.round(+new Date / 1E3) - <?php echo $this->cronTimeout; ?> && (new Ajax("system/cron/cron.php"));
        });
}, 5E3);
```