HTML5實現手機搖一搖更換背景色，因爲手機上大部分瀏覽器都是支持HTML5的，所以本效果在電腦上看不到效果，把代碼複製到手機上運行一下，甩一甩手機就看到顏色變化了。
<!doctype html>
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width,initial-scale=1.0"/>
<title>HTML5 手機搖一搖</title>
<script type="text/javascript">
var color = new Array('#fff', '#ff0', '#f00', '#000', '#00f', '#0ff');
if(window.DeviceMotionEvent) {
var speed = 25;
var x = y = z = lastX = lastY = lastZ = 0;
window.addEventListener('devicemotion', function(){
var acceleration =event.accelerationIncludingGravity;
x = acceleration.x;
y = acceleration.y;
if(Math.abs(x-lastX) > speed || Math.abs(y-lastY) > speed) {
document.body.style.backgroundColor = color[Math.round(Math.random()*10)%6];
}
lastX = x;
lastY = y;
}, false);
}
</script>
</head>
<body>
HTML 5 手機搖一搖，在手機上運行的。
</body>
</html>
