基于jquery的图片懒加载js

以下是实现代码(基于jquery): 代码如下: function lazyload(option){ var settings={ defObj:null, defHeight:0 }; settings=$.extend(settings,option||{}); var defHeight=settings.defHeight,defObj=(typeof settings.defObj==”object”)?settings.defObj.find(“img”):$(settings.defObj).find(“img”); var pageTop=function(){ retur