摘要：
1、样式及HTML代码如下：<style type="text/css">#toTop{background-image:url(Images/qqbg.png);}#toTop{width:54px;height:54px;display:block;position:fixed;right:25px;bottom:45px;background-position:-700px -110px;opacity:0.3;filter:alpha(opacity=30);z-index:100000001px;}#toTop:hover{opacity:1;filt 阅读全文
