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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<script type="text/javascript">
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function changeSize()
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{
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document.getElementById("frame1").height="300";
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document.getElementById("frame1").width="300";
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}
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function restoreSize()
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{
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document.getElementById("frame1").height="200";
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document.getElementById("frame1").width="200";
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}
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</script>
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</head>
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​
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<body>
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<iframe src="/example/hdom/frame_a.html" id="frame1" height="200" width="200"></iframe>
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<br /><br />
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​
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<input type="button" onclick="changeSize()" value="Change size" />
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<input type="button" onclick="restoreSize()" value="Restore size" />
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​
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</body>
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</html>
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​