var Timer;
var TotalSeconds;

function getTotalSeconds() {

var t1 = new Date(2012, 03, 28, 1, 0, 0, 0);
var t2 = new Date();
var dif = t1.getTime() - t2.getTime();

var Seconds_from_T1_to_T2 = dif / 1000;
var Seconds_Between_Dates = Math.abs(Seconds_from_T1_to_T2);

return Seconds_Between_Dates;
}

function CreateTimer(TimerID, Time) {
    Timer = document.getElementById(TimerID);
    TotalSeconds = Time;
    
    UpdateTimer();
    window.setTimeout("Tick()", 1000);
}

function Tick() {
    if (TotalSeconds <= 0) {
        alert("Time's up!");
        return;
    }

    TotalSeconds -= 1;
    UpdateTimer();
    window.setTimeout("Tick()", 1000);
}

function UpdateTimer() {
    var Seconds = TotalSeconds;
    
    var Days = Math.floor(Seconds / 86400);
    Seconds -= Days * 86400;

    var Hours = Math.floor(Seconds / 3600);
    Seconds -= Hours * (3600);

    var Minutes = Math.floor(Seconds / 60);
    Seconds -= Minutes * (60);

    var TimeStr = LeadingZero(Days) + " : " + LeadingZero(Hours) + " : " + LeadingZero(Minutes);

    Timer.innerHTML = TimeStr;
}


function LeadingZero(Time) {

    return (Time < 10) ? "0" + Time : + Time;

}