Change background-image periodically using Tumblr's API
<!DOCTYPE HTML>
<html>
<head>
<meta charset="UTF-8">
<title>Demo - Tumblr Background Imager</title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<script type="text/javascript" src="http://r7kamura.tumblr.com/api/read/json?num=50&type=photo"></script>
<script type="text/javascript" src="js/tumblr_background_imager.js"></script>
<style type="text/css">
body {
width: 100%;
height: 100%;
background-attachment: fixed;
background-size: cover;
}
</style>
</head>
<body>
</body>
</html>