css 如何重复背景图像仅水平方向

编辑代码

<!DOCTYPE html>
<html>
<head>
<style>
body
{
background-image:url('/images/online_demo/paper.gif');
background-repeat:repeat-x;
}
</style>
</head>

<body>
<p>repeat-x will repeat a background image only horizontally.</p>
</body>
</html>