css滚动条

<img src="1.jpg"><script>$(".loading .pic").animate({width:10%},100);</script><img src="2.jpg"><script>$(".loading .pic").animate({width:50%},100);</script><img src="3.jpg"><script>$(".loading .pic").animate({width:100%},100,function(){ ???????$(".loading").fadeOut(); ??});</script><style>.loading{width:100%;height:100%;position:fixed;top:0;left:0;z-index:100;background:#fff;}.loading .pic{width:100%;height:10px;position:absolute;top:0;left:0;background:#f33}</style><div class="loading"> ???<div class="pic"></div><div>