i have some clock script. Everything is fine and it's work perfectly but... i have one problem. If at the clock is set one digit hour or minute like 1:5 clock not adding 0 digit before. This what i'v done but it does't work. Can u help me, much thx?

window.setInterval(function update_clock() {

    var currentTime = new Date();

    var currentHours = currentTime.getHours();

    var currentMinutes = currentTime.getMinutes();

    $.ajax({

        success: function (clock) {

            document.getElementById(hour).firstChild.nodeValue = currentHours;

            document.getElementById(minutes).firstChild.nodeValue = currentMinutes;

            if (currentMinutes.length == 1) {

                currentMinutes = 0 + currentMinutes;

            }

        }

    });

}, 999);