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求修改这段代码！只保留绿色圆环，JS那边求注释啊，angle和cartoon函数看不懂

只要最后一个绿色圆环，我直接一删好像数字就不会倒计时了。把前两个删掉。
刷新时倒计时不归零怎么整

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>多彩炫酷环形时钟效果 &gt;&gt; 张鑫旭-鑫空间-鑫生活</title>
<style type="text/css">
#fancyClock{
    margin:40px auto;
    height:200px;
    border:1px solid #111111;
    width:600px;
}
.clock{
    /* 时钟div */
    background-color:#252525;
    height:200px;
    width:200px;
    position:relative;
    overflow:hidden;
    float:left;
}

.clock .rotate{
    /* 两个旋转的div，每个都分为左右两部分 */
    position:absolute;
    width:200px;
    height:200px;
    top:0;
    left:0;
}

.rotate.right{
    display:none;
    z-index:11;
}

.clock .bg, .clock .front{
    width:100px;
    height:200px;
    background-color:#252525;
    position:absolute;
    top:0;
}

.clock .display{
    /* 小时，分钟，秒钟的显示 */
    position:absolute;
    width:200px;
    font-family:"Lucida Sans Unicode", "Lucida Grande", sans-serif;
    z-index:20;
    color:#F5F5F5;
    font-size:60px;
    text-align:center;
    top:55px;
    left:0;
    
    /* CSS3 文字阴影 */
    text-shadow:4px 4px 5px #333333;
}

/* 左半边部分 */

.clock .bg.left{ left:0; }

/* 每个不同颜色的背景图: */
.orange .bg.left{ background:url(http://image.zhangxinxu.com/image/blog/201008/bg_orange.png) no-repeat left top; }
.green .bg.left{ background:url(http://image.zhangxinxu.com/image/blog/201008/bg_green.png) no-repeat left top; }
.blue .bg.left{    background:url(http://image.zhangxinxu.com/image/blog/201008/bg_blue.png) no-repeat left top; }

/* 右边部分 */
.clock .bg.right{ left:100px; }

.orange .bg.right{ background:url(http://image.zhangxinxu.com/image/blog/201008/bg_orange.png) no-repeat right top; }
.green .bg.right{ background:url(http://image.zhangxinxu.com/image/blog/201008/bg_green.png) no-repeat right top; }
.blue .bg.right{ background:url(http://image.zhangxinxu.com/image/blog/201008/bg_blue.png) no-repeat right top; }

.clock .front.left{
    left:0;
    z-index:10;
}
</style>
</head>
<body>
<div id="fancyClock">
    <div class="orange clock">
        <div class="display" id="hours">00</div>
        <div class="front left"></div>
        <div class="rotate left" id="orangeRotateLeft">
            <div class="bg left"></div>
         </div>
        <div class="rotate right" id="orangeRotateRight">
            <div class="bg right"></div>
        </div>
    </div>
    <div class="blue clock">
        <div class="display" id="minuts">00</div>
        <div class="front left"></div>
        <div class="rotate left" id="blueRotateLeft">
            <div class="bg left"></div>
        </div>
        <div class="rotate right" id="blueRotateRight">
            <div class="bg right"></div>
        </div>
    </div>
    <div class="green clock">
        <div class="display" id="seconds">00</div>
        <div class="front left"></div>
        <div class="rotate left" id="greenRotateLeft">
            <div class="bg left"></div>
        </div>
        <div class="rotate right" id="greenRotateRight">
            <div class="bg right"></div>
        </div>
    </div>
</div> 
<script type="text/javascript">
(function(){
    var $ = function(id){
        return document.getElementById(id);
    };
    var o = {    
        hour: $("hours"), //小时数值对象
        minu: $("minuts"), //分钟数值对象
        sec: $("seconds"), //秒钟数值对象
        orgl: $("orangeRotateLeft"), //黄色旋转左半区
        orgr: $("orangeRotateRight"), //黄色旋转右半区
        bluel: $("blueRotateLeft"), //蓝色旋转左半区
        bluer: $("blueRotateRight"), //蓝色旋转右半区
        greenl: $("greenRotateLeft"), //绿色旋转左半区
        greenr: $("greenRotateRight") //绿色旋转右半区
    };
    var f = {
        css: function(o,key){
            return o.currentStyle? o.currentStyle[key] : document.defaultView.getComputedStyle(o,false)[key];     
        },
        zero: function(n, top){
            n = parseInt(n, 10), top = top || "00";
            if(n > 0){
                if(n <= 9){
                    n = "0" + n;    
                }
                return String(n);
            }else{
                return top.toString();    
            }
        },
        angle: function(v, total){
            var scale = v / total, offsetx = 0, offsety = 0, an;
            var angle = scale * 360; //当前角度值
            //IE矩阵角度值计算
            var m11 = Math.cos(Math.PI*2 / 360 * angle)
            var m21 = Math.sin(Math.PI*2 / 360 * angle);
            if(angle > 90){
                an = angle - 90;
            }else{
                an = angle;    
            }
            offsety = offsetx = (200 - 200 * Math.sqrt(2) * Math.cos(Math.PI / 180 * Math.abs(an - 45))) / 2 ;
            return {
                trans: "rotate("+angle+"deg)",    
                ie: "progid:DXImageTransform.Microsoft.Matrix(M11="+m11+",M12=-"+m21+",M21="+m21+",M22="+m11+",SizingMethod='auto expand',FilterType='nearest neighbor')",
                offset: {
                    x: offsetx,
                    y: offsety
                }
            };
        },
        cartoon: function(l, r, v, part){
            var total = part * 2, angleV, anglePart;
            if(v <= part && v > 0){
                angleV = f.angle(v, total);
                l.style.display = "block";
                l.style.filter = angleV.ie;
                l.style.MozTransform = l.style.WebkitTransform = l.style.transform = angleV.trans;
                r.style.display = "none";
                //ie 旋转非居中旋转的修复
                if(document.all){
                    l.style.left = angleV.offset.x + "px";
                    l.style.top = angleV.offset.y + "px";
                }
            }else{
                v = Math.abs(v - part);
                angleV = f.angle(v, total);
                anglePart = f.angle(part, total);
                l.style.display = "block";
                l.style.filter = anglePart.ie;
                l.style.MozTransform = l.style.WebkitTransform = l.style.transform = anglePart.trans;
                r.style.display = "block";
                r.style.filter = angleV.ie;
                r.style.MozTransform = r.style.WebkitTransform = r.style.transform = angleV.trans;
                if(document.all){
                    r.style.left = angleV.offset.x + "px";
                    r.style.top = angleV.offset.x + "px";
                }
            }
        },
        ui: function(){
            var mytime = new Date();
            var h = mytime.getHours(),  m = mytime.getMinutes(), s = mytime.getSeconds();
            o.hour.innerHTML = f.zero(h);
            o.minu.innerHTML = f.zero(m, 60);
            o.sec.innerHTML = f.zero(s, 60);
            f.cartoon(o.orgl, o.orgr, h, 12);
            f.cartoon(o.bluel, o.bluer, m, 30);
            f.cartoon(o.greenl, o.greenr, s, 30);
            setTimeout(f.ui, 1000);
        }
    };    
    f.ui();
})();
</script>
</body>
</html>

我从页面删除那个倒计时就不动了 那两个方法求解释啊

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