[ Javascript ] - 20140626-题目1

[ Javascript ] - 20140626-题目1

用代码实现一个毫秒级的倒计时，且可以多处调用。
格式如：离建群三周年还有: 30天-23小时-40分钟-58秒-32毫秒

PS:
1. 回复时注意加上下面这句话，才会有语法高亮或格式缩进。
```javascript
// you code
```
2. 粘贴代码时请使用shift+tab，缩进前面的空白。

菜鸟提几个问题，只是讨论，没有针对任何人的意思啊
1： settimeout setInterval 最短时间 1000 /60 = 16.7ms 用到这里【精准】判断毫秒时差 是否会有问题？
2 :

 var start = (new Date).getTime();

var diff = (new Date).getTime() - start;   // FIXME  为什么会是0?
//2
 var start = (new Date).getTime();
setTimeout(function(){

var diff = (new Date).getTime() - start;   // FIXME  这里是0  按照上面的计算 至少应是1吧
console.log(diff);   // diff 为2
},1);
// 一个跟我同样的疑问  http://a4.qpic.cn/psb?/V10iuC9m3BtAyN/JM*OzJBw.zz3MzzTjOJltBaUoIRa5TT4nzBZ043eqFQ!/c/dKJxEulIFQAA&bo=VgOAAgAAAAABAPA!&rf=0-18

<div id="times"></div>
<br>
<br>
<div id="time2"></div>
<br>
<br>
<div id="time3"></div>
<br>
<br>
<div id="time4"></div>
<br>
<br>
<div id="time5"></div>
<script>
    function fuckTime(id,str){

        this.date=new Date(str).getTime();//new Date(2014,8,12,10,10,40);
        this.times='';
        this.o=document.getElementById(id);
        this.speed();
    }

    fuckTime.prototype.speed=function(){
        //alert(this.date+'*'+(new Date().getTime()));
        var thisms = new Date().getTime();
        var mms = this.date - thisms;
        if(mms<=0){
            this.o.innerHTML="正在进入开奖.....";
            clearInterval(this.times);
            return;
        }
        //alert(mms);
        var dayfm = 3600 * 24 * 1000;//一天的毫秒
        var d = Math.floor(mms / dayfm);
        mms = mms - dayfm * d;
        var h = Math.floor(mms/(3600*1000));
        mms = mms - 3600 * 1000 * h;
        var m = Math.floor(mms / 60000);
        mms = mms - 60000 * m;
        var s = Math.floor(mms / 1000);
        mms = mms - 1000 * s;
        var ms = mms;
        var str = "开奖还有:" + d + "天—" + h + "小时—" + m + "分—" + s + "秒—" + ms;
        this.o.innerHTML=str;
        var that=this;
        var doSpeed=function(){
            return that.speed();
        }
        if(!this.times){
            this.times=setInterval(doSpeed,1)
        }
    }
var a=new fuckTime("times","July 1,2014 12:12:12");
var b=new fuckTime("time2","August 9,2014 12:12:12");
var C=new fuckTime("time3","September 9,2014 12:12:12");
var D=new fuckTime("time4","October 9,2014 12:12:12");
var E=new fuckTime("time5","August 29,2014 12:12:12");
</script>