var scrollLoad = (function (_tagName, _paterTagName, _marker) {
    //          var defaults = (arguments.length == 0) ? { src: 'xSrc', time: 300} : { src: options.src || 'xSrc', time: options.time || 300 };
    var defaults = { src: _marker, time: 300 };
    var camelize = function (s) { return s.replace(/-(\w)/g, function (strMatch, p1) { return p1.toUpperCase(); }); };

    this.getStyle = function (element, property) {
        if (arguments.length != 2) return false;
        var value = element.style[camelize(property)];
        if (!value) {
            if (document.defaultView && document.defaultView.getComputedStyle) {
                var css = document.defaultView.getComputedStyle(element, null);
                value = css ? css.getPropertyValue(property) : null;
            } else if (element.currentStyle) {
                value = element.currentStyle[camelize(property)];
            }
        }
        return value == 'auto' ? '' : value;
    };
    var _init = function () {
        var offsetPage = window.pageYOffset ? window.pageYOffset : window.document.documentElement.scrollTop,
                offsetWindow = offsetPage + Number(window.innerHeight ? window.innerHeight : document.documentElement.clientHeight),
        // docImg = document.images,
                docImg = $(_tagName, _paterTagName);
        _len = docImg.length;
        if (!_len) return false;
        for (var i = 0; i < _len; i++) {
            var attrSrc = docImg[i].getAttribute(defaults.src),
                    o = docImg[i], tag = o.nodeName.toLowerCase();
            if (o) {
                postPage = o.getBoundingClientRect().top + window.document.documentElement.scrollTop + window.document.body.scrollTop; postWindow = postPage + Number(this.getStyle(o, 'height').replace('px', ''));
                if ((postPage > offsetPage && postPage < offsetWindow) || (postWindow > offsetPage && postWindow < offsetWindow)) {
                    if (attrSrc !== null) {
                        o.setAttribute("src", attrSrc);
                    }
                    o = null;
                }
            }
        };
        window.onscroll = function () {
            setTimeout(function () {
                _init();
            }, defaults.time);
        }
    };
    return _init();
});