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代码编辑器：
<html> <meta charset="utf-8"> <link href="/static/next/css/tryit.css?v=2017082407" rel="stylesheet"/> <script src="/static/js/loadxmldoc.js"></script> <script> var xmlDoc = new ActiveXObject("Microsoft.XMLDOM"); xmlDoc.async=false; xmlDoc.load("note_error.xml"); document.write("Error code: " + xmlDoc.parseError.errorCode); document.write("<br>Error reason: " + xmlDoc.parseError.reason); document.write("<br>Error line: " + xmlDoc.parseError.line); </script> <footer>简单教程，简单编程<br/>Copyright © 简单教程 www.twle.cn</footer>
运行结果：