frozenjs有图片随滚动条异步加载的功能么? about frozenjs HOT 2 OPEN

 function onScroll() {
        if (base.hasMask() || !hasMore) {
            return;
        }
        var viewHeight = $(window).height();//浏览器可视区域高度
        var scrollHeight = $(window).scrollTop();//已滚动高度
        var docHeight = $(document).height();//页面文档高度
        var loadingHeight = $("#loading").height();
        if (lastDocHeight == docHeight) {//避免页面内容改变前多次触发滚动条事件导致重复加载内容
            return false;
        }
        if (viewHeight + scrollHeight >= docHeight - loadingHeight / 2) {
            lastDocHeight = docHeight;
           // to do something
        } else if (viewHeight + scrollHeight >= docHeight - loadingHeight / 2 - 100) {
            var date = new Date();
            var now = date.getTime();
            if (window.lastSetScrollTime == undefined || now - window.lastSetScrollTime >= 200) {
                document.body.scrollTop = scrollHeight;
                window.lastSetScrollTime = now;
            }
        }
    }
      $(window).scroll(function (event) {
            onScroll();
        });