实例代码：
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<style>
div{
background:url(img/flower.gif);
background-repeat:no-repeat;
height:180px;
padding:35px;
border:5px solid black;
width:560px;
}
.div-1{
background-origin:padding-box;
}
.div-2{
background-origin:border-box;
}
.div-3{
background-origin:content-box;
}
</style>
</head>
<body>
<h1>background-origin属性</h1>
<p>未设置background-origin(padding-box 为默认)：</p>
<div class="div-1">
<h3>Welcome to Shaighai</h3>
<p>Shanghai is one of the four direct-administered municipalities of the People's Republic of China. Welcome to Shanghai!
The city is located on the southern estuary of the Yangtze, with the Huangpu River flowing through it.</p>
</div>
<p>background-origin:border-box: </p>
<div class="div-2">
<h3>Welcome to Shaighai</h3>
<p>Shanghai is one of the four direct-administered municipalities of the People's Republic of China. Welcome to Shanghai!
The city is located on the southern estuary of the Yangtze, with the Huangpu River flowing through it.</p>
</div>
<p>background-origin:content-box: </p>
<div class="div-3">
<h3>Welcome to Shaighai</h3>
<p>Shanghai is one of the four direct-administered municipalities of the People's Republic of China. Welcome to Shanghai!
The city is located on the southern estuary of the Yangtze, with the Huangpu River flowing through it.</p>
</div>
</body>
</html>运行效果：
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