W3School TIY Editor
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<html> <head> <script type="text/javascript" src="/example/xdom/loadxmldoc.js"></script> </head> <body> <script type="text/javascript"> xmlDoc=loadXMLDoc("/example/xdom/books.xml"); newComment=xmlDoc.createComment("Revised March 2008"); x=xmlDoc.getElementsByTagName("book")[0]; x.appendChild(newComment); document.write(x.lastChild.nodeValue); </script> </body> </html>