基于html5背景图片自适应代码是一款背景不随滚动条滚动，会根据分辨率不同自动匹配对应的背景图片。效果图如下：

在线预览    源码下载

实现的代码。

css代码：

.jawbone-hero .jawbone-hero-image {
	position:absolute;
	background:transparent none no-repeat scroll 50% 0;
	background-size:cover;
	top:0;
	bottom:0;
	left:0;
	right:0;
	width:100%;
	margin:0 auto;
	z-index:-1
}
.jawbone-hero {
	height:100%;
	min-height:550px
}
.jawbone-hero .jawbone-hero-image {
	position:fixed
}
#h1.jawbone-takeover-minimulti .jawbone-hero-image {
	background-image:url(../images/hero-600.jpg)
}
@media (min-width: 600px) {
	#h1.jawbone-takeover-minimulti .jawbone-hero-image {
	background-image:url(../images/hero-1280.jpg)
}
}@media (min-width: 1016px) {
	#h1.jawbone-takeover-minimulti .jawbone-hero-image {
	background-image:url(../images/hero-2000.jpg)
}

via：http://www.w2bc.com/Article/40891

在线预览    源码下载