<!doctype html>
<html>
    <head>
        <meta charset="utf-8">
        <title>Error 503</title>
        <style type="text/css">
            body {
                font: 12px/20px Verdana, Geneva, 'Dejavu Sans', Arial, Helvetica, sans-serif;
            }
        </style>
    </head>
    <body>
        <h1>Error 503</h1>
        <p>The site is currently unavailable due to ongoing updates. It should be back shortly!</p>
        <p>The page will refresh when the site becomes available again.</p>
        <p><a href="javascript:location.reload(true)">Retry</a></p>
        <script type="text/javascript">
            setInterval(function() {
                var xhr = new XMLHttpRequest;
                xhr.onreadystatechange = function() {
                    if(xhr.readyState === 4 && xhr.status !== 503)
                        document.links[0].click();
                };
                xhr.open('HEAD', location.pathname + '?_check=' + Date.now().toString());
                xhr.send();
            }, 10000);
        </script>
    </body>
</html>
