​x
 
<!DOCTYPE html>
<html>
<body>
​
<p id="demo">请点击按钮来获得 &lt;p&gt; 元素的 ownerDocument 的节点类型。</p>
​
<button onclick="myFunction()">试一下</button>
​
<script>
function myFunction()
{
var x=document.getElementById("demo");  
x.innerHTML=x.ownerDocument.nodeType;
}
</script>
​
</body>
</html>
​