count down timer

gistfile1.txt

<p id="whiteTimeLeft"></p>
<button id="start">start</button>
<button id="stop">stop</button>

var secs = 599;
function decrementTimer() {
    var currentMinutes = "0" + Math.floor(secs / 60);
    var currentSeconds = Math.floor((secs % 60));
    if(currentSeconds <= 9) currentSeconds = "0" + currentSeconds;
    var timeLeft = currentMinutes + ":" + currentSeconds;
    $("#whiteTimeLeft").text(timeLeft);
    secs--
}
var clearDecrementTimer; 
$("#start").click(function(){
    clearDecrementTimer = setInterval(function(){
        decrementTimer()
    }, 1000);
});
$("#stop").click(function(){
    clearInterval(clearDecrementTimer);
});

===============================================================================================================

<p id="whiteTimeLeft"></p>

var decrementTimer = function(secs) {
    var currentMinutes = "0" + Math.floor(secs / 6000);
    var currentSeconds = Math.floor((secs%60));
    if(currentSeconds <= 9) currentSeconds = "0" + currentSeconds;
    var timeLeft = currentMinutes + ":" + currentSeconds;
    console.log(timeLeft);
    $("#whiteTimeLeft").text(timeLeft);
    if(secs > 0) setTimeout(function(){decrementTimer(secs-1)},1000);
  };
decrementTimer(59999);


===============================================================================================================

<p id="whiteTimeLeft"></p>

var element = document.getElementById("whiteTimeLeft");
var time = new Date();
time.setMinutes(10);
time.setSeconds(0);
function decrementTimer() {
    element.innerHTML = time.getMinutes() + ":" + time.getSeconds(); // todo: pad zeroes
    time.setSeconds(time.getSeconds() - 1);
    setTimeout(decrementTimer, 1000);
}

decrementTimer();