Html协议

http协议:引用http或https地址时,需要补全http协议信息,如:

<style>
//CSS背景图片 
.bg{background: url(//game.gtimg.cn/images/cf/cp/a20161021sqjs/hd.jpg) no-repeat;}
</style>
//链接URL
<a href="//cf.qq.com/main.shtml">进入官网</a>
//图片SRC
<img src="//game.gtimg.cn/images/cf/web201610/logo.png">
//JS链接
<script src="//ossweb-img.qq.com/images/js/title.js"></script>