DeviceOrientation demo
by jorgeluis
HTML
<div id="display"></div>
JavaScript
var display = document.getElementById('display');
if( window.DeviceOrientationEvent ) {
window.addEventListener('deviceorientation', function(event) {
var alpha = event.alpha; // z
var beta = event.beta; // x
var gamma = event.gamma; // y
if(alpha!=null || beta!=null || gamma!=null)
dataContainerOrientation.innerHTML = 'alpha: ' + alpha + '<br/>beta: ' + beta + '<br />gamma: ' + gamma;
}, false);
}