<!DOCTYPE html>
<html>
<body>
<p id="demo"></p>
<script>
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
myFunction(this);
}
};
xhttp.open("GET", "books.xml", true);
xhttp.send();
function myFunction(xml) {
var x, newatt, xmlDoc;
xmlDoc = xml.responseXML;
newatt = xmlDoc.createAttribute("edition");
newatt.nodeValue = "first";
x = xmlDoc.getElementsByTagName("title");
x[0].setAttributeNode(newatt);
document.getElementById("demo").innerHTML =
"Edition: " + x[0].getAttribute("edition");
}
</script>
</body>
</html>