​x
 
<!DOCTYPE html>
<html>
<body>
​
<h1>JavaScript HTML DOM</h1>
​
<p>Hellow World!</p>
​
<p>Hello China!</p>
​
<p id="demo"></p>
​
<script>
var myNodelist = document.querySelectorAll("p");
document.getElementById("demo").innerHTML =
"此文档包含 " + myNodelist.length + " 段文字。";
</script>
​
</body>
</html>
​