在线运行代码 - 菜鸟教程

<!DOCTYPE html>
<html>
<head> 
<meta charset="utf-8"> 
<title>菜鸟教程(cainiaoplay.com)</title>
<style>#myDIV{
	border:1px solid black;
	width:300px;
	height:150px;
	padding:35px;
	background:url('smiley.gif.html') no-repeat;
}
</style>
</head>
<body>

<p>点击“尝试一下”按钮设置 DIV 元素的 background-origin 属性为 "content-box"：</p>
<button onclick="myFunction()">尝试一下</button>
<div id="myDIV">
	Lorem ipsum dolor sit amet, consectetuer adipiscing elit, 
	sed diam nonummy nibh euismod tincidunt ut laoreet dolore 
	magna aliquam erat volutpat. Ut wisi enim ad minim veniam, 
	quis nostrud exerci tation ullamcorper suscipit lobortis nisl 
	ut aliquip ex ea commodo consequat.
</div>
<script>
function myFunction(){
	document.getElementById("myDIV").style.backgroundOrigin = "content-box";
}
</script>

</body>
</html>
源代码

动行结果
