案例：javascript案例     状态：可编辑再运行    进入竖版
 运行结果　
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<html>
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<head>
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<style type="text/css">
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input
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{
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position:relative;
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}
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</style>
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<script type="text/javascript">
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function setPositionAbsolute()
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{
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document.getElementById("b1").style.position="absolute";
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document.getElementById("b1").style.top="10px";
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}
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</script>
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</head>
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<body>
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​
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<p>This is an example paragraph</p>
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<p>This is an example paragraph</p>
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<p>This is an example paragraph</p>
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<p>This is an example paragraph</p>
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<p>This is an example paragraph</p>
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<p>This is an example paragraph</p>
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<p>This is an example paragraph</p>
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<p>This is an example paragraph</p>
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<p>This is an example paragraph</p>
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<p>This is an example paragraph</p>
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<p>This is an example paragraph</p>
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<p>This is an example paragraph</p>
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<p>This is an example paragraph</p>
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<p>This is an example paragraph</p>
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​
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<input type="button" id="b1" onclick="setPositionAbsolute()" value="Set button position to be absolute" />
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​
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</body>
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</html>
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​