继续倒计时

解决用户手动修改本地时间的bug

<div class="free_time" id="clock">
                        <cite class="fr mts f14"><strong>还剩<font class="c_pink" id="surplus">10</font>份</strong></cite>
                        <cite class="c_grey2 f14">剩余时间:</cite>
                        <span class="time_num">00</span>天
                        <span class="time_num">00</span>小时
                        <span class="time_num">00</span>分
                        <span class="time_num">00.0</span>秒
                    </div>
Clock.startCount({
         target: clockBox,
         endTime:1337826623,
         nowTime:1337587763
    });
/**
 * @version    2012.05.21
 * @author    lq
 **/
var Clock = (function(){
    var GetTime = function(o){
        this.setting = typeof o === 'object' ? o : {};
        this.target = this.setting.target || 'clock';
        this.elems = this.target.getElementsByTagName("span");
        this.nowTimes = this.setting.nowTime || 0;  
        this.endTimes = this.setting.endTime || 0; 
        //控制器
        this.controller;
        this.setTimes = this.setting.seTimes || 100;
        this.nowTime= new Date(parseInt(this.nowTimes)*1000);
        this.endTime= new Date(parseInt(this.endTimes)*1000);
        //初始化时间
        this.day = 0;
        this.hour = 0;
        this.minute = 0;
        this.second = 0;
        this.Ms = 0;
        this.init();
    }    
    GetTime.prototype ={
        init:function(){
            var me = this;
            var time = me.endTime.getTime() - me.nowTime.getTime();
            me.nowTime = new Date(me.nowTime.getTime() + me.setTimes);
            if(time!=0 || time != null){
                if(parseInt(time)&&time>=0&&time!=""){
                    //初始化
                    me.showTime(time);    
                    me.controller = setInterval(function(){
                        me.setTimeCount();
                    },me.setTimes);
                }else{
                    me.elemCreat();
                }
            }
        },
        setTimeCount:function(){
            var me = this;
            var newTime = me.nowTime;
            var time = me.endTime;
            if(newTime<=0){
                me.statusFn();
                clearTimeout(me.controller);
                return;    
            }
            var now = time.getTime() - this.nowTime.getTime();    
            this.nowTime = now<=0 ? 0 : new Date(this.nowTime.getTime() + me.setTimes);    
            me.showTime(now);    
        },
        showTime:function(time){
            this.day = Math.floor(time/(1000 * 60 * 60 * 24));
            this.hour = Math.floor(time/(1000*60*60)) % 24;
            this.minute = Math.floor(time/(1000*60)) % 60;
            this.second = Math.floor(time/1000) % 60;
            this.Ms = Math.floor(time/100) % 10;
            //
            this.elemCreat();
        },
        elemCreat:function(){
            var me = this;
            var second,minute,hour,day;
            if(me.Ms<=0){me.Ms=0;}
            second = me.second<=0 ? "00" : me.second;
            minute = me.minute<=0 ? "00" : me.minute;
            hour = me.hour<=0 ? "00" : me.hour;
            day = me.day<=0 ? "00" : me.day;
            //
            me.elems[3].innerHTML = second+"."+me.Ms;
            me.elems[2].innerHTML = minute;
            me.elems[1].innerHTML = hour;
            me.elems[0].innerHTML = day;    
        }
    }
    return {
        startCount:function(o){
            var _time = new GetTime(o);
        }    
    }
})();