利用JS实现网站已运行XX天的代码

利用JS实现网站已运行XX天的代码

   <span id="span"></span>
    <script type="text/javascript">function runtime(){// 初始时间，日/月/年 时:分:秒
            X = new Date("11/18/2016 8:32:00");
            Y = new Date();
            T = (Y.getTime()-X.getTime());
            M = 24*60*60*1000;
            a = T/M;
            A = Math.floor(a);
            b = (a-A)*24;
            B = Math.floor(b);
            c = (b-B)*60;
            C = Math.floor((b-B)*60);
            D = Math.floor((c-C)*60);//信息写入到DIV中
            span.innerHTML = "本站勉强运行: "+A+"天"+B+"小时"+C+"分"+D+"秒"}setInterval(runtime, 1000);
    </script>