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 showCharset()
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{
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var x=document.getElementById("myForm")
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alert(x.acceptCharset)
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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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<form id="myForm" acceptCharset="ISO-8859-1">
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Text: <input type="text" value="Hello World!">
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<input type="button" onclick="showCharset()" value="Show charset">
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</form>
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​
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</body>
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</html>
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​