function loadImgLazy(node) { var lazyNode = $('[node-type=imglazy]', node),  mobileHeight, lazyOffSetHeight, tempHeight, currentNodeTop, imgObject,  imgDataSrc, localUrl; localUrl = location.href; // 獲取當(dāng)前瀏覽器可視區(qū)域的高度 mobileHeight = $(window).height(); return function(co) {  var conf = {   'loadfirst': true,   'loadimg': true  };  for (var item in conf) {   if (item in co) {    conf.item = co.item;   }  }  var that = {};  var _this = {};  /**   * [replaceImgSrc 動(dòng)態(tài)替換節(jié)點(diǎn)中的src]   * @param {[type]} tempObject [description]   * @return {[type]}   [description]   */  _this.replaceImgSrc = function(tempObject) {   var srcValue;   $.each(tempObject, function(i, item) {    imgObject = $(item).find('img[data-lazysrc]');    imgObject.each(function(i) {     imgDataSrc = $(this).attr('data-lazysrc');     srcValue = $(this).attr('src');     if (srcValue == '#') {      if (imgDataSrc) {       $(this).attr('src', imgDataSrc);       $(this).removeAttr('data-lazysrc');      }     }    });   });  };  /**   * 首屏判斷屏幕上是否出現(xiàn)imglazy節(jié)點(diǎn)，有的話就加載圖片   * @param {[type]} i) {     currentNodeTop [description]   * @return {[type]} [description]   */  _this.loadFirstScreen = function() {   if (conf.loadfirst) {    lazyNode.each(function(i) {     currentNodeTop = $(this).offset().top;     if (currentNodeTop < mobileHeight + 800) {      _this.replaceImgSrc($(this));     }    });   }  };  //當(dāng)加載過(guò)首屏以后按照隊(duì)列加載圖片  _this.loadImg = function() {   if (conf.loadimg) {    $(window).on('scroll', function() {     var imgLazyList = $('[node-type=imglazy]', node);     for (var i = 0; i < 5; i++) {      _this.replaceImgSrc(imgLazyList.eq(i));     }    });   }  };  that = {   replaceImgSrc: _this.replaceImgSrc(),   mobileHeight: mobileHeight,   objIsEmpty: function(obj) {    for (var item in obj) {     return false;    }    return true;   },   destory: function() {    if (_this) {     $.each(_this, function(i, item) {      if (item && item.destory) {       item.destory();      }     });     _this = null;    }    $(window).off('scroll');   }  };  return that; };}