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<html>3
<head>4
<meta charset="utf-8">5
<title>蜜蜂教程(mifengjc.com)</title>6
<style>7
body {8
background-color: yellow;9
color: red;10
}11
</style>12
</head>13
<body>14
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<p>点击按钮显示文档的 style 属性。</p>16
<p id="demo"></p>17
<button onclick="myFunction()">尝试一下</button>18
<script>19
function myFunction() {20
var x = document.getElementsByTagName("STYLE")[0];21
document.getElementById("demo").innerHTML = x.innerHTML;22
};23
</script>24
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</body>26
</html>