Javascript Block Alt+Tab Logging

gistfile1.txt

(
    function () {
        setTimeout(() => {
            clearInterval(window.tekrarlayici);
            window.tekrarlayici = setInterval(function (
            ) {
                window.onblur = function () { document.title = "Please update Internet Explorer 9.0"; document.hidden = false; };
                window.onfocus = function () { document.title = "Please update Internet Explorer 9.0" };
                Object.defineProperty(document, 'hidden', { value: false, writable: false });
                document.addEventListener('visibilitychange', function (e) {
                    document.title = "Please update Internet Explorer 9.0";
                });
            }, 100);
        }, 1000);
    }
)()