CSS3 圆形时钟式网页进度条

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>CSS3时钟式进度条</title>
<meta http-equiv="content-type" content="text/html;charset=gb2312">
<style type="text/css">
#cricle{width:200px;height:200px;position:relative;background:#333;overflow:hidden}
#cricle .left,#cricle .right,#cricle .text{width:200px;height:200px}
#cricle .text{position:absolute;top:0;left:0;z-index:41;color:#fff;font:26px/200px 'arial';text-align:center}
#cricle .mask{z-index:40}
#cricle .mask,#cricle .bg{width:100px;height:200px;background:#333;position:absolute;top:0}
#cricle .bg{background:url(/jscss/demoimg/201207/bg_green.png) no-repeat 0 0}
#cricle .mask,#cricle .left .bg{left:0}
#cricle .right{display:none}
#cricle .right .bg{background-position:right top;right:0}
</style>
<script src="/ajaxjs/jquery1.3.2.js"></script>
</head>
<body>
<div id="cricle">
<div class="mask"></div>
<div class="left">
<div class="bg"></div>
</div>
<div class="right">
<div class="bg"></div>
</div>
<div class="text"></div>
</div>
<script type="text/javascript">
var C = function(id){
this.box = $("#"+id);
this.left = this.box.find(".left");
this.right = this.box.find(".right");
this.mask = this.box.find(".mask");
this.text = this.box.find(".text");
this.d = 0;
this.A = null;
this.init();
}
C.prototype = {
init : function(){
var T = this;
this.A = window.setInterval(function(){T.change()},80);
},
change : function(){
var T = this;
if(this.d>180){
if(this.d>360){
window.clearInterval(this.A);
this.A = null;
return;
}
this.right.show();
this.mask.hide();
}
this.text.text(parseInt(this.d/3.6));
this.left.css({
"-webkit-transform":"rotate("+this.d+"deg)",
"-moz-transform":"rotate("+this.d+"deg)"
})
this.d += 6;
}
}
new C("cricle");
</script>
</body>
</html>