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"); x=xmlDoc.getElementsByTagName('title'); //add a new attribute to each title element for(i=0;i<x.length;i++) { x[i].setAttribute("edition","first"); } //Output title and edition value for (i=0;i<x.length;i++) { document.write(x[i].childNodes[0].nodeValue); document.write(" - Edition: "); document.write(x[i].getAttribute('edition')); document.write("<br />"); } </script> </body> </html>