<!DOCTYPE html>
<html>
<head>
<style>
#cc {
font-size: 20px;
color: red;
}
</style>
</head>
<body onload="normPara()">
<p id="demo">Click one button to add text to the document, click the other button to normalize the document.</p>
<button onclick="addTextNode()">Add a Text Node</button>
<button onclick="normPara()">Normalize the Document</button>
<p>The document has <span id="cc">1</span> child node(s).</p>
<script>
function addTextNode() {
var x = document.createTextNode(" Click again.");
var y = document.body;
y.appendChild(x);
var x = document.getElementById("cc");
x.innerHTML = y.childNodes.length;
}
function normPara() {
document.normalize();
var x = document.body;
var y = document.getElementById("cc");
y.innerHTML = x.childNodes.length;
}
</script>
</body>
</html>