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<!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.html", "books.xml", true);
xhttp.send();
​
function myFunction(xml) {
    var xmlDoc = xml.responseXML;
    var x = get_firstChild(xmlDoc.getElementsByTagName("book")[0]);
    document.getElementById("demo").innerHTML = x.nodeName;
}
​
//check if the first node is an element node
function get_firstChild(n) {
    var y = n.firstChild;
    while (y.nodeType != 1) {
        y = y.nextSibling;
    }
    return y;
}
</script>
​
</body>
​
<!-- Mirrored from www.w3schools.com/xml/tryit.asp?filename=try_dom_nav_firstchild by HTTrack Website Copier/3.x [XR&CO'2014], Wed, 05 Jun 2019 13:52:33 GMT -->
</html>
​
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