var lastAngel = window.angel;
window.angel += 3.6 * direction;
var different = Math
.ceil((Math.cos(window.angel / 180 * Math.PI) – Math
.cos(lastAngel / 180 * Math.PI))
* height * 100) / 100;
return different;
}
</script>
</head>
<body>
<div id=”wrapper”>
<div id=”up” class=”paper”>
g
</div>
<div id=”foldUp” class=”paper”>
n
</div>
<div id=”foldDown” class=”paper”>
b
</div>
<div id=”down” class=”paper”>
t
</div>
</div>
<button onclick=fold();>
fold
</button>
</body>
</html>
