JQueryはページカウントダウンとリフレッシュを実現

var intDiff = parseInt(600);//       
        function timer(intDiff){
            window.setInterval(function(){
            var day=0,
                hour=0,
                minute=0,
                second=0;//            
            if(intDiff > 0){
                day = Math.floor(intDiff / (60 * 60 * 24));
                hour = Math.floor(intDiff / (60 * 60)) - (day * 24);
                minute = Math.floor(intDiff / 60) - (day * 24 * 60) - (hour * 60);
                second = Math.floor(intDiff) - (day * 24 * 60 * 60) - (hour * 60 * 60) - (minute * 60);
            }else{//     ，    
                window.location.reload();
            }
            if (minute <= 9) minute = '0' + minute;
            if (second <= 9) second = '0' + second;

            $(".timeShow").html('       '+minute+' '+second+'   ,      : 10   ');
            intDiff--;

            }, 1000);

        } 
        $(function(){
            timer(intDiff);
        });

<span class="timeShow">span>