Thread: Java Script error "was used before it was defined" ERROR - please help

var playing = false;
var score;
var action;
var timeremaining;
 
//if we click on the start/reset
document.getElementById("startreset").onclick = function () {
    "use strict";
    if (playing === true) {
        location.reload(); //reload page
    } else {//if we are not playing
        //change mode to playing
        playing = true;
        //set score to 0
        score = 0;
        document.getElementById("scorevalue").innerHTML = score;
 
        //show countdown box
        document.getElementById("timeremaining").style.display = "block";
        timeremaining = 60;
        document.getElementById("timeremaingvalue").innerHTML = timeremaining;
 
        //change button to reset
        document.getElementById("startreset").innerHTML = "Reset Game";
 
        //start countdown
        startCountdown();
    }
};
 
function startCountdown() {
    "use strict";
    action = setInterval(function () {
        timeremaining -= 1;
        document.getElementById("timeremaingvalue").innerHTML = timeremaining;
        if (timeremaining === 0) {//game over
            stopCountdown();
        }
    }, 1000);
}
 
function stopCountdown() {
    "use strict";
    clearInterval(action);
}

The error codes I am getting are listed below. Can someone please tell me how I define the 2 items and where please?
JSLint (2)
27 'startCountdown' was used before it was defined. startCountdown();
37 'stopCountdown' was used before it was defined. stopCountdown();