(function () {
                if (window.self !== window.top) {
                    var a = document.createElement('img');
                    a.src = 'https://static2.dditscdn.com/cob/site/lslcommon/image/12A45/B12.7a5d65.gif?parent=' + document.referrer;
                    a.width = '1';
                    a.height = '1';
                    document.body.appendChild(a)
                }
            })();