<!DOCTYPE html>
<html>
<head>
<script src="http://github.hubspot.com/offline/offline.min.js"></script>
<script src="http://github.hubspot.com/offline/js/snake.js"></script>
<link rel="stylesheet" href="http://github.hubspot.com/offline/themes/offline-theme-chrome.css" />
<script>
Offline.options = {
game: false,
checks: {
image: {
url: 'http://yourcustomurl.com/offlinejs/my-image.gif'
}
}
}
var run = function(){
if (Offline.state === 'up')
Offline.check();
}
setInterval(run, 5000);
</script>
</head>
<body>
<div class="offline-ui offline-ui-up">
<div class="offline-ui-content">
</div>
</div>
</body>
</html>