<!DOCTYPE html>
<html>
<body>
<p id="demo1"></p>
<p id="demo2"></p>
<script>
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (xhttp.readyState == 4 && xhttp.status == 200) {
myFunction(xhttp);
}
};
xhttp.open("GET", "books.xml", true);
xhttp.send();
function myFunction(xml) {
var x, i, attnode, xmlDoc, txt;
xmlDoc = xml.responseXML;
txt = "";
x = xmlDoc.getElementsByTagName('title');
for (i = 0; i < x.length; i++) {
txt += x[i].childNodes[0].nodeValue + "<br>";
}
document.getElementById("demo1").innerHTML = txt;
for (i = 0; i < x.length; i++) {
x[i].childNodes[0].nodeValue = "changed";
}
txt = "";
for (i = 0; i < x.length; i++) {
txt += x[i].childNodes[0].nodeValue + "<br>";
}
document.getElementById("demo2").innerHTML = txt;
}
</script>
</body>
</html>