var month = '12';     //  '*' for next month, '0' for this month or 1 through 12 for the month 
var day = '25';       //  Offset for day of month day or + day  
var hour = 16;        //  0 through 23 for the hours of the day
var tz = 0;         //  Offset for your timezone in hours from UTC
var lab = 'countdown';    //  The id of the page entry where the timezone countdown is to show

function start() {
	displayTZCountDown(setTZCountDown(month,day,hour,tz),lab);
}

window.onload = start;

function setTZCountDown(month,day,hour,tz) {
	var toDate = new Date();
	if (month == '*')toDate.setMonth(toDate.getMonth() + 1);
	
	else if (month > 0) { 
		if (month <= toDate.getMonth())toDate.setYear(toDate.getYear() + 1);
		toDate.setMonth(month-1);
	}

	if (day.substr(0,1) == '+') {
		var day1 = parseInt(day.substr(1));
		toDate.setDate(toDate.getDate()+day1);
	} 
	else {
		toDate.setDate(day);
	}

	toDate.setHours(hour);
	toDate.setMinutes(0-(tz*60));
	toDate.setSeconds(0);
	var fromDate = new Date();
	fromDate.setMinutes(fromDate.getMinutes() + fromDate.getTimezoneOffset());
	var diffDate = new Date(0);
	diffDate.setMilliseconds(toDate - fromDate);
	
	return Math.floor(diffDate.valueOf()/1000);
}

function displayTZCountDown(countdown,tzcd) {
	if (countdown < 0) document.getElementById(tzcd).innerHTML = ""; 
	else {
		var secs = countdown % 60; 
	
		if (secs < 10) secs = '0'+secs;
		var countdown1 = (countdown - secs) / 60;
		var mins = countdown1 % 60; 
		if (mins < 10) mins = '0'+mins;
		countdown1 = (countdown1 - mins) / 60;
		var hours = countdown1 % 24;
		var days = (countdown1 - hours) / 24;
		
		if (hours < 10) {
			hours = '0' + hours;
		}
		
		document.getElementById(tzcd).innerHTML = days + ' : ' + hours + ' : ' +mins+ ' : ' + secs;
		setTimeout('displayTZCountDown('+(countdown-1)+',\''+tzcd+'\');',999);
	}
}