<!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, newCDATA, xmlDoc;
xmlDoc = xml.responseXML;
newCDATA = xmlDoc.createCDATASection("Special Offer & Book Sale");
x = xmlDoc.getElementsByTagName("book")[0];
x.appendChild(newCDATA);
document.getElementById("demo").innerHTML = x.lastChild.nodeValue;
}
</script>
</body>
</html>