jqueryʵÏÖÍøվͼƬÀÁ¼ÓÔØ´úÂë

//ÀÁ¼ÓÔØ´úÂë
function _LazyImg(con) {
    var li = con;//con.find(".service-item");
    var win = $(window);
    var wh = win.height();
    var n = 0;
    var loadimg = function() {
            var st = win.scrollTop() + wh;
            li.each(function() {
                    var t = $(this);
                    var ot = t.offset().top;
                    if (st >= ot && !t.attr("loaded")) {
                            n++;
                            t.attr("loaded", true);
                            t.find("img.lazyimg").each(function() {
                                    var img = $(this);
                                    var ori = img.attr("original");
                                    img.hide().attr("src", ori).fadeIn();
                            });
                    }
            });
            if (n == li.length) {
                    win.unbind("scroll", loadimg);
            }
    };
    win.bind("scroll", loadimg);
    loadimg();
}