background-image 属性可以设置背景图像。
背景图像可以填充整个页面的，也可以填写一部分。
background-image 属性的使用很简单：background-image:url(图片地址)
填充整个页面示例
<!DOCTYPE html>
< html >
< head >
< title >背景图片</ title >
< style type = "text/css" >
body {
background-image: url("[https://www.liyongzhen.com/docs/images/crossline-dots.png](https://www.oschina.net/action/GoToLink?url=https%3A%2F%2Fwww.liyongzhen.com%2Fdocs%2Fimages%2Fcrossline-dots.png)");
padding: 20px;}
</ style >
</ head >
< body >
< h1 >软件开发，成就梦想</ h1 >
< h2 >学编程，上利永贞网 [https://www.liyongzhen.com/](https://www.oschina.net/action/GoToLink?url=https%3A%2F%2Fwww.liyongzhen.com%2F)</ h2 >
</ body >
</ html >