Simple example
Source code:
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0">
<title>IIIF Viewer | Examples</title>
<script src="https://cdn.klokantech.com/iiifviewer/v1.2/iiifviewer.js" type="text/javascript"></script>
</head>
<body>
<div id="map" style="width:600px;height:400px;border:1px solid #000;"></div>
<script type="text/javascript">
var url = location.hash.toString().substr(1);
if (url.length < 2)
url = 'http://demo.iiifhosting.com/iiif/demo/info.json';
new IiifViewer('map', url);
</script>
</body>
</html>