function isScrollBottom() {        var documentHeight = document.documentElement.scrollHeight;        var winHeight = document.documentElement.clientHeight;        var scrollPosition = winHeight + getScrollTop();        return console.log(documentHeight == scrollPosition);     }    function getScrollTop() {        if (typeof pageYOffset != ‘undefined‘) {            //most browsers except IE before #9            return pageYOffset;        }        else {            var B = document.body; //IE ‘quirks‘            var D = document.documentElement; //IE with doctype            D = (D.clientHeight) ? D : B;            return D.scrollTop;        }    }