function countdown(year, month, day, hour, minute, format){
	Today = new Date();
	Todays_Year = Today.getFullYear() - 2000;
	Todays_Month = Today.getMonth();                  

	//Convert both today's date and the target date into miliseconds.                           
	Todays_Date = (new Date(Todays_Year, Todays_Month, Today.getDate(), 
    Today.getHours(), Today.getMinutes(), Today.getSeconds())).getTime();                                 
	Target_Date = (new Date(year, month - 1, day, hour, minute, 00)).getTime();                  

	//Find their difference, and convert that into seconds.                  
	Time_Left = Math.round((Target_Date - Todays_Date) / 1000);

	if(Time_Left < 0)
		Time_Left = 0;

	switch(format){
		case 0:
			//The simplest way to display the time left.
        	document.getElementById('countdown_content').innerHTML = Time_Left + ' seconds';
        	break;
		case 1:
        	//More datailed.
            days = Math.floor(Time_Left / (60 * 60 * 24));
            Time_Left %= (60 * 60 * 24);
            hours = Math.floor(Time_Left / (60 * 60));
            Time_Left %= (60 * 60);
            minutes = Math.floor(Time_Left / 60);
            Time_Left %= 60;
            seconds = Time_Left;

			dps = 's'; hps = 's'; mps = 's'; sps = 's';
            if(days == 1) dps ='';
            if(hours == 1) hps ='';
            if(minutes == 1) mps ='';
            if(seconds == 1) sps ='';

			document.getElementById('countdown_content').innerHTML = days + ' day' + dps + ' : ';
            document.getElementById('countdown_content').innerHTML += hours + ' hr' + hps + ' : ';
            document.getElementById('countdown_content').innerHTML += minutes + ' min' + mps + ' : ';
            document.getElementById('countdown_content').innerHTML += seconds + ' sec' + sps;
            break;
       default: 
            document.getElementById('countdown_content').innerHTML = Time_Left + ' seconds';
	}

	if(hours == 0 && minutes == 0 && seconds == 0){
		document.getElementById('countdown_content').innerHTML = "It's Here!";
	}

	//Recursive call, keeps the clock ticking.
	setTimeout('countdown(' + year + ',' + month + ',' + day + ',' + hour + ',' + minute + ',' + format + ');', 1000);
}