​x
 
<!DOCTYPE html>
<html>
<body>
​
<p id="demo">点击按钮添加文本，点击另一个按钮来正规化元素。</p>
​
<button onclick="addTextNode()">添加文本节点</button>
​
<button onclick="normPara()">对段落进行正规化</button>
​
<script>
function addTextNode()
{
var y=document.createTextNode("请再次点击。");
var x=document.getElementById("demo");
x.appendChild(y);
var z=document.getElementById("cc");
z.innerHTML=x.childNodes.length;
}
​
function normPara()
{
var x=document.getElementById("demo");  
x.normalize();
var z=document.getElementById("cc");
z.innerHTML=x.childNodes.length;
}
</script>
​
<p>上面的段落有 <span id="cc">1</span> 个子节点。</p>
​
</body>
</html>
​