function countdown_clock (year, month, day, hour, minute, format) {
	//I chose a div as the container for the timer, but
	//it can be an input tag inside a form, or anything
	//who's displayed content can be changed through
	//client-side scripting.
	//html_code = '<div id="countdown"></div>';

	//document.write(html_code);

	countdown (year, month, day, hour, minute, format);                
}

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').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';
			zero = "<span style=\"color: #999;\">--</span>";
			//ps is short for plural suffix.
			if (days == 1) dps ='';
			if (hours == 1) hps ='';
			if (minutes == 1) mps ='';
			if (seconds == 1) sps ='';
			// If less than 10, add leading zero
			if (days < 10) days = "0"+days;
			if (hours < 10) hours = "0"+hours;
			if (minutes < 10) minutes = "0"+minutes;
			if (seconds < 10) seconds = "0"+seconds;
			// If countdown reaches zero, replace with '--'
			if (days == 0) days = zero;
			if ((days == 0) && (hours == 0)) hours = zero;
			if ((days == 0) && (hours == 0) && (minutes == 0)) minutes = zero;
			//document.getElementById('countdown').innerHTML = days + ' day' + dps + ' ';
			//document.getElementById('countdown').innerHTML += hours + ' hour' + hps + ' ';
			//document.getElementById('countdown').innerHTML += minutes + ' minute' + mps + ' and ';
			//document.getElementById('countdown').innerHTML += seconds + ' second' + sps;
			document.getElementById('countdown').innerHTML = "<table class=\"countdown\"><tr><td>"+days+"</td><td>"+hours+"</td><td>"+minutes+"</td><td>"+seconds+"</td></tr></table>"
			break;
		default: 
			document.getElementById('countdown').innerHTML = Time_Left + ' seconds';
	}

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