Tryit Editor v1.8

Source Code:
<html> <body> <script> var xmlDoc = new ActiveXObject("Microsoft.XMLDOM"); xmlDoc.async="false"; xmlDoc.validateOnParse="false"; xmlDoc.load("note_dtd_error.xml"); document.write("<br>Error Code: "); document.write(xmlDoc.parseError.errorCode); document.write("<br>Error Reason: "); document.write(xmlDoc.parseError.reason); document.write("<br>Error Line: "); document.write(xmlDoc.parseError.line); </script> </body> </html>
Result:
W3Schools.com - Try it yourself