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<html>3
<head>4
<meta charset="utf-8">5
<title>蜜蜂教程(mifengjc.com)</title>6
<style type="text/css">7
body {8
background: #f3f3f3 url("/examples/img_tree.png");9
}10
</style>11
<script>12
function displayResult() {13
document.body.style.backgroundRepeat = "repeat-y";14
}15
</script>16
</head>17
<body>18
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<button type="button" onclick="displayResult()">垂直重复背景图像</button>20
<br>21
<h1>Hello World!</h1>22
<p>这是一个段落</p>23
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</body>25
</html>