案例:JSON案例     状态:可编辑再运行    进入竖版
 运行结果 
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<title>W3xue教程(w3xue.com)</title>
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</head>
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<body>
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<h2>字符串转换为函数</h2>
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<p id="demo"></p>
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<script>
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var text = '{ "name":"W3xue", "alexa":"function () {return 10000;}", "site":"www.w3xue.com"}';
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var obj = JSON.parse(text);
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obj.alexa = eval("(" + obj.alexa + ")");
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document.getElementById("demo").innerHTML = obj.name + " Alexa 排名:" + obj.alexa(); 
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</script>
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</body>
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</html>