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<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width,initial-scale=1.0"/>
<title>HTML5 手机摇一摇</title>
<script type="text/javascript">
var i = 0;
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) {
i += parseInt(1);//自加变量
var txt = document.getElementById("txt");//获取text属性
txt.value = i;//将次数i赋值给text
document.body.style.backgroundColor = color[Math.round(Math.random()*10)%6];
}
lastX = x;
lastY = y;
}, false);
}
</script>
</head>
<body>
<input type="text" name="txt" id="txt" value="0" />次
HTML 5 手机摇一摇，在手机上运行的。
</body>
</html>
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