<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>051</title>
</head>
<body>
<p><img src="11.jpg"," alt="image description"></p>
<p><img src="22.jpg"," alt="image description"></p>
<p><img src="33.jpg"," alt="image description"></p>
</body>
<script type="text/javascript">
var imgs = document.getElementsByTagName('img');
console.log(imgs.length);
var p = document.createElement("p");
var img = document.createElement("img");
img.src = "someimg.jpg";
p.appendChild(img);
var paras = document.getElementsByTagName('p');
paras[0].parentNode.appendChild(p);
console.log(imgs.length);
var allelems = document.getElementsByTagName('*');
console.log(allelems.length);
</script>
</html>
