JavaScript: Convert milliseconds to object with days, hours, minutes, and seconds

msconvert.js

function convertMS( milliseconds ) {
    var day, hour, minute, seconds;
    seconds = Math.floor(milliseconds / 1000);
    minute = Math.floor(seconds / 60);
    seconds = seconds % 60;
    hour = Math.floor(minute / 60);
    minute = minute % 60;
    day = Math.floor(hour / 24);
    hour = hour % 24;
    return {
        day: day,
        hour: hour,
        minute: minute,
        seconds: seconds
    };
}