Javascript完整的记时应用代码 _JavaScript

Javascript完整的倒计时应用代码
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<title>Javascript完整的倒计时应用代码――物联网技术资讯互动平台</title>
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<meta name="keywords" content="物联网技术,物联网资讯,物联网平台" />
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<body>

<span id="Lasttime" ></span>
</body>
</html>
<script language="javascript" type="text/javascript">
        var NowTime = new Date(2011,5-1,8,9,29,22);
		//当前时间
        var EndTime= new Date(2011,5-1,8,20, 0,0);
		//截止时间
        var DiffTime = NowTime.getTime() - (new Date()).getTime();
        var RemainD = '天';
        var RemainH = '小时';
        var RemainM = '分';
        var RemainS = '秒';
        function GetRTime(){
        NowTime = new Date();
	    var nMS = EndTime.getTime()- (NowTime.getTime() + DiffTime);
	    var nD = Math.floor(nMS/(1000 * 60 * 60 * 24));
	    var nH = Math.floor(nMS/(1000*60*60)) % 24;
	    var nM = Math.floor(nMS/(1000*60)) % 60;
	    var nS = Math.floor(nMS/1000) % 60;
	    var nMS = Math.floor(nMS/100) % 10;
 	    var s = "";	    
	    if(nD > 0)
	    { s += nD + RemainD; }
	    if(nH > 0)
	    { s += nH + RemainH; }
	    if(nM > 0)
	    { s += nM + RemainM; }
	    if(nS > 9)
	    { s += nS + RemainS; }
	    else if(nS >0)
	    { s += "0" + nS + RemainS; }
	    else
	    { s += "00" + RemainS; }
	    
	    if(nD<=0 && nH<=0 && nM<=0 && nS<=0)
	    {
	       $("#Lasttime").html("已经结束").addClass("red");
 	        return;
	    }
	    else if(nD>0) 
	    {
	        $("#Lasttime").html(nD + RemainD+nH + RemainH);
 	    }
	    else if(nD<=0&&nH>1)
	    {
	        $("#Lasttime").html(s);
 	    }
 	    
	    else if(nD<=0&&nH<1&&nS>0&&nM>30)
	    {
	     $("#Lasttime").html(s);
  	    }
 	    else if(nD<=0&&nH<1&&nM<30)
 	    {
 	         $("#Lasttime").html(s).addClass("red");
 	    }
	      setTimeout("GetRTime()",1000);
        }
       
        var mkstate=0;
        if(0!=1)
        {
            if(mkstate==0)
            {
                document.onload=GetRTime();
            }
            else
            {
             $("#Lasttime").html("已经结束").addClass("red");
            }
        }
        else
        {
           $("#Lasttime").html("不受限制");
        }
  </script>