localUrl = location.href;
// 获取当前浏览器可视区域的高度
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 动态替换节点中的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');
}
}
});
});
};

/**

• 首屏判断屏幕上是否出现imglazy节点，有的话就加载图片
• @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));
  }
  });
  }
  };

//当加载过首屏以后按照队列加载图片
_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,item) {
if (item && item.destory) {
item.destory();
}
});
_this = null;
}
$(window).off('scroll');
}
};
return that;
};
}