页面未加载完成，显示loading的图标

html代码

<div id="loading"><i></i>
</div>

#loading{width: 100%;height: 100%;background-color: #fff;position: fixed;top:0;left: 0;z-index: 9999;
}#loading >i{width: 64px;height: 64px;position: absolute;top:0;bottom:0;left:0;right: 0;margin: auto;background: url("/images/loading.gif") no-repeat;}

document.onreadystatechange = function () {if(document.readyState === "complete"){$("#loading").fadeOut();}
}