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wheezy.web / demos / quickstart-empty / content / maintenance.html

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<html>
<head>
    <title>Maintenance</title>
    <meta http-equiv="refresh" content="120" url="/" />
    <style>
    html, body { height: 50%; }
    html { display: table; margin: auto; }
    body { display: table-cell; vertical-align: middle; font-family: monospace;}
    #t { color: grey; }
    </style>
</head>
<body>
    <h1>
        Scheduled Maintenance
    </h1>
    <p>
        <span id="t"></span> Visit us later, please.
    </p>
    <script>
    document.getElementById('t').innerHTML = new Date().toLocaleTimeString() + ':';
    </script>
</body>    
</html>