<html>
<body>
<img src="one.jpg" width="100" height="100" />
<img src="two.jpg" width="100" height="100" />
<img src="three.jpg" width="100" height="100" />
<img src="four.jpg" width="100" height="100" />
<p>Number of images in this form are:
<script type="text/javascript">
document.write(document.images.length);
</script></p>
</body>
</html>
Output:
Number of images in this form are: 4