function load_review_box() {

            var containers = document.querySelectorAll("[data-review-widget]");
            containers.forEach(function(container) {
                var review_widget_guid = container.dataset.reviewWidget;
                var xhttp = new XMLHttpRequest();
                xhttp.onreadystatechange = function() {
                    if (this.readyState == 4 && this.status == 200) {
                        container.innerHTML = this.responseText;
                        if (container.dataset.reviewCallback) {
                            window[container.dataset.reviewCallback](container);
                        }
                    }
                };
                xhttp.open("POST", "https://buchananco.perfectportal.co.uk/apps/reviews/v0.1/get_reviews?review_widget_guid="+container.dataset.reviewWidget+"&auth=NkVRU1hGWTNwYkV0MmozWFdTL1JwQWxBZGtpckZITFVPTFR4bC9jYXUzM09UY0VnYXRlaFVyZ3NxemtzVjVJeElad3gyaTR5N3BMRTMrdHlhS2k3V3BzV3g3MHcvNHpMV1FHRFM1RUkxTkFJTzhpTGhabFhXcHIyQ01yb2ZjRDVBaUpyTjdtdG03dHdNelRLQXZlSkhBPT0=", true);
                xhttp.send();
            });

            return true;
        }
        load_review_box();