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<!DOCTYPE html>
<html>
<style>
div {
  border: 1px solid black;
  margin: 15px;
}
</style>
<body>
<h1>The Element Object</h1>
<h2>The lastChild Property</h2>
<p>Click the button to get the node name of the DIV's last child node.</p>
<div id="myDIV"><p>A P element - First child in div</p><span>A Span element - Last child in div</span></div>
<button onclick="myFunction()">Try it</button>
<p id="demo"></p>
<script>
function myFunction() {
  var x = document.getElementById("myDIV").lastChild.nodeName;
  document.getElementById("demo").innerHTML = x; 
}
</script>
</body>
</html>