减少图片请求，分批加载图片
var lazyLoad = {?Init: function () {?return $("img[lazyload]");?},?Calculate: function (lazyloadobject) {?var windowHeight = $(window).height();?var arrReturn = {};?var _scrollTop;?if (lazyloadobject.length == 0) {?return null;?}?else {?lazyloadobject.each(function (i) {?_scrollTop = parseInt($(this).offset().top - windowHeight);?if (!arrReturn.hasOwnProperty(_scrollTop)) {?arrReturn[_scrollTop] = new Array();?}?arrReturn[_scrollTop].push($(this));?});?this.ArrLoad = arrReturn;?return arrReturn;?}?},?ArrLoad: null,?IsLoad: function (scrolltop, objectstop) {?if (objectstop != null && objectstop != {}) {?for (i in this.ArrLoad) {?if (parseInt(i) <= scrolltop && this.ArrLoad.hasOwnProperty(i)) {?for (j = 0; j < this.ArrLoad[i].length; j++) {?this.ArrLoad[i][j].attr("src", this.ArrLoad[i][j].attr("lazyload")).removeAttr("lazyload");?}?delete this.ArrLoad[i];?}?}?}?},?Run: function () {?var lazyLoadObject = this.Init();?this.Calculate(lazyLoadObject);?arrScrollTop = this.ArrLoad;?if (arrScrollTop == null) {?return false;?}?else {?var _this = this;?_this.IsLoad($(window).scrollTop(), arrScrollTop);?$(window).scroll(function () {?_this.IsLoad($(this).scrollTop(), arrScrollTop);?});?}?}?}?$(function () {?lazyLoad.Run();?});?$(window).resize(function () {?lazyLoad.Run();?});
