一个直接放在title中:<title><img src="" alt=""></title>
二是加在背景中:css中:title{background(../images/???.png)}
三是用伪元素: css中:title:before{content:''{background(../images/???.png)}
下载返回顶部的xttop.js文件http://www.bjrjzm.com/resource/js/xttop.js
调用:
var mytop =new xttop({img:"http://www.bjrjzm.com/resource/images/gotop.gif",height:"36px",width:"36px"})
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