一个页面的倒计时代码

js:

$(function(){   
//====倒计时====   
        var timePush = {},timeId,STATIC = {'0':'h','1':'m','2':'s'},items = $(".items-prod li");   
        $(".time-left", items).each(function(index, callback) {   
            timePush["T" + index] = returnTime.call(this);   
        });   
  
        timeId = setTimeout(function() {   
            if (isEmptyObj.call(timePush)) {   
                clearTimeout(timeId);   
                return false;   
            }   
            //提前预定 处理   
            timeId = setTimeout(arguments.callee, 1000);   
            //处理   
            $.each(timePush, function(index, callback) {   
                //递归获取更新后的时间   
                var timeItem = getTime(this, 2);   
                if (timeItem.join("") - 0 == 0) {   
                    deleteTime(index);   
                } else {   
                    updateTime(index, timeItem);   
                }   
            });   
        }, 1);   
  
        function getTime(arr, type, pre) {   
            if (type < 0)return 0;   
            var num = _numTmp = ~~arr[type],_type = STATIC["" + type];   
            switch (_type) {   
                case 'h':   
                    --num < 0 ? pre = 0 : num;   
                    break;   
                case 'm':   
                    num = fixed2Str(--num < 0 ? getTime(arr, type - 1, 59) : num);   
                    pre = ~~arr[type - 1] || _numTmp ? pre : 0;   
                    arr[type] = num;   
                    break;   
                case 's':   
                    arr[type] = fixed2Str(--num < 0 ? getTime(arr, type - 1, 59) : num);   
                    break;   
                default:   
                    break;   
            }   
            if (pre != void 0)return pre;   
            return arr;   
        }   
  
        function updateTime(key, arr) {   
            var index = key.replace(/[^\d]/g, ''),str = arr.join("").split("");   
            $(".time-left", items.eq(index)).find("span i").each(function(index) {   
                this.innerHTML = str[index];   
            })   
        }   
  
        function deleteTime(key) {   
            var index = key.replace(/[^\d]/g, '');   
            delete timePush[key];   
            $(".reply-btn", items.eq(index)).attr("class", "submit-btn disabled-big").html('<span><em></em>已经结束</span>');   
            $(".time-left", items.eq(index)).find("span i").html(0);   
        }   
  
        function isEmptyObj() {   
            for (var i in this)return false;   
            return true;   
        }   
  
        function fixed2Str(number) {   
            if (number < 10)number = "0" + number;   
            return "" + number;   
        }   
  
        function returnTime() {   
            var time = [];   
            $("span", this).each(function() {   
                time.push($(this).text());   
            });   
            return time;   
        }   
});  

 html:

<div class="time-leave">  
                    <span class="fl">剩余时间：</span>  
  
                    <div class="time-left fl"><p>  
                        <span><i>0</i><i>0</i></span><span><i>3</i><i>6</i></span><span><i>3</i><i>9</i></span></p>  
                    </div>  
                </div>