index.html

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="initial-scale=1.0, width=device-width, user-scalable=no" />
<meta name="apple-mobile-web-app-capable" content="yes" />
<title>Shake.js</title>
<style type="text/css">
body {
    background: #E9E9E9;
    color: #333;
    font: 1em/1.3em "Helvetica Neue", Helvetica, Arial, Verdana, sans-serif; /* 16px / 21px */
    text-shadow: rgba(255,255,255,0.8) 0 1px 0;
    text-align: center;
}
</style>
<script type="text/javascript" src="shake.js"></script>
</head>
<body>

<h1>Shake to Undo</h1>
<h2>for your mobile web app</h2>

<p>Shake your iPhone/iPad to see a custom action.</p>
<p>Works on iOS +4.2.1, Android 4.0.3 (default browser), Opera Mobile (Android), BlackBerry PlayBook 2.0</p>

<p><a href="http://dev.w3.org/geo/api/spec-source-orientation">W3C DeviceOrientation Event Specification</a></p>

<script type="text/javascript">
window.onload = function() {

    //create a new instance of shake.js.
    var myShakeEvent = new Shake({
        threshold: 15
    });

    // start listening to device motion
    myShakeEvent.start();

    // register a shake event
    window.addEventListener('shake', shakeEventDidOccur, false);

    //shake event callback
    function shakeEventDidOccur () {

        //put your own code here etc.
        alert('Shake!');
    }
};
</script>
</body>
</html>