JS-倒计时效果

团购-限时抢
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

 <html xmlns="http://www.w3.org/1999/xhtml">

 <head>

 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

 <title>团购——限时抢</title>

 <link rel="stylesheet" href="style.css"  />

 </head>

 <body>

 <div class="content3">

 <div class="time">还剩 <span id="LeftTime"></span></div>

 </div>

 <script>

 function FreshTime()

 {

         var endtime=new Date("2017/5/15,12:20:12");//结束时间

         var nowtime = new Date();//当前时间

         var lefttime=parseInt((endtime.getTime()-nowtime.getTime())/1000);

         d=parseInt(lefttime/3600/24);

         h=parseInt((lefttime/3600)%24);

         m=parseInt((lefttime/60)%60);

         s=parseInt(lefttime%60);

         document.getElementById("LeftTime").innerHTML=d+"天"+h+"小时"+m+"分"+s+"秒";

         if(lefttime<=0){

         document.getElementById("LeftTime").innerHTML="团购已结束";

         clearInterval(sh);

         }

 }

 FreshTime()

 var sh;

 sh=setInterval(FreshTime,1000);

 </script>

 </body>

 </html>