为什么我没有得到正确的时间？

Question

如果21600是6秒钟，为什么我的柜台会说7小时15分钟？我在这里错过了什么吗？

这里是一个演示：

• http://jsfiddle.net/kLk4f/

JS

var time_in_seconds = 26100; // 6 hours in seconds 

setInterval(function() { 
    $('#countdown').html(seconds2time(time_in_seconds)); 
    time_in_seconds--; 
}, 1000); 

function seconds2time(seconds) { 
    var hours = Math.floor(seconds/3600); 
    var minutes = Math.floor((seconds - (hours * 3600))/60); 
    var seconds = seconds - (hours * 3600) - (minutes * 60); 
    var time = ""; 

    if (hours != 0) { 
     time = hours+":"; 
    } 
    if (minutes != 0 || time !== "") { 
     minutes = (minutes < 10 && time !== "") ? "0"+minutes : String(minutes); 
     time += minutes+":"; 
    } 
    if (time === "") { 
     time = seconds+"s"; 
    } 
    else { 
     time += (seconds < 10) ? "0"+seconds : String(seconds); 
    } 
    return time; 
} 

HTML

<span id="countdown"></span>​ 

Answer 1

26100是不一样的21600