案例：javascript案例     状态：可编辑再运行    进入横版
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<html>
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<head>
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<script type="text/javascript">
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function changeVisibility()
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{
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document.getElementById("p1").style.visibility="hidden";
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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 id="p1">This is some text. This is some text. This is some text.
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This is some text. This is some text. This is some text.
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This is some text. This is some text. This is some text.</p>
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​
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<input type="button" onclick="changeVisibility()" value="Hide text" />
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​
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</body>
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</html>
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​

 运行结果　
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