下面是生成需旋轉半徑的JS代碼，可以靈活的調節旋轉的半徑
<html>
<body>
<script type="text/javascript">
function indent(obj, length) {
var temp = obj + "";
var temp1 = temp.substr(0, length);
return parseFloat(temp1);
}
// R 需要旋轉的半徑
function makeCSS(R) {
for (var i = 0; i <= 360; i += 18) {
var percent = parseInt(i / 360 * 100) + "%";
var left = parseInt(R + -1 * Math.sin(2 * Math.PI / 360 * i) * R);
var opacity = (R + -1 * Math.cos(2 * Math.PI / 360 * i) * R) / (R * 2) * 0.8 + 0.2;
var fontSize = <pre name="code" class="html">(R + -1 * Math.cos(2 * Math.PI / 360 * i) * R) / (R * 2)