js倒计时 

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
    <title>jsdmeo</title>
    <script src="jquery-3.3.1.min.js"></script>
</head>
<body onLoad="leftTimer()">
   抢购倒计时：
    <p class="tit_right" style="">
        <span id="h" style="">00</span>
        <span id="m" style="">00</span>
        <span id="s" style="">00</span>
    </p>
    <p style="" id="juli"></p>
    
    
    <script >
        function leftTimer(year,month,day,hour,minute,second){
            var newDate = new Date();
            var newDate1 = new Date(year,month-1,day,hour,minute,second);
            var leftTime = (new Date(year,month-1,day,hour,minute,second))-(new Date());//计算剩余的毫秒数
            var days = parseInt(leftTime / 1000/60/60/24,10);//calcute left days
            var hours = parseInt(leftTime / 1000 / 60 / 60 % 24 , 10); //计算剩余的小时 
        var minutes = parseInt(leftTime / 1000 / 60 % 60, 10);//计算剩余的分钟 
        var seconds = parseInt(leftTime / 1000 % 60, 10);//计算剩余的秒数 
        if(seconds<0){
            $(".tit_right").css('display','none');
            $("#juli").text("开始抢购")
        }else{
            days = fix(days,2)    ;
            hours = fix(hours,2);
            minutes = fix(minutes,2);
            seconds = fix(seconds,2);
            setTimeout("leftTimer(2018,8,12,00,0,0)",1000);
            document.getElementById("h").innerHTML = hours;
            document.getElementById("m").innerHTML = minutes;
            document.getElementById("s").innerHTML=seconds;
          }
        }
        //fix 函数，将1-9的1位数转换成1-09格式format
        function fix(num ,length){
            return (''+num).length < length ? ((new Array(length+1)).join('0')+num).slice(-length):''+num;
        }
        
        
    </script>
</body>
</html>

 

posted @ 2018-08-11 11:59  dafengchui  阅读(258)  评论(0)    收藏  举报