document.addEvent('domready', function(){
	if(document.id('countdown')){	
		var countdownTxt = '';
		var oneMin = 60*1000;
		var oneHr = oneMin*60;
		var oneDay = oneHr*24;
	
		// Exhibition start time - obtained from Config.Set in "CommonControls/Events/SITE_Page_Script.ascx"
		var d = new Date(Config.get('eventstartdate'));
		var start = Date.UTC(d.getFullYear(), d.getMonth(), d.getDate(), d.getHours(), d.getMinutes(), d.getSeconds(), d.getMilliseconds());
	
		var showCounter = (function() {	
			// convert now time to milliseconds
			var now = new Date();
			now = now.getTime();
	
			// determine no. milliseconds until Exhibition starts and convert to days/hrs/mins
			var ems = start-now;				
			var days = Math.floor(ems/oneDay);							
			var hrs = Math.floor((ems-(days*oneDay))/oneHr);				
			var mins = Math.floor((ems-(days*oneDay)-(hrs*oneHr))/oneMin);
			var secs = Math.floor((ems-(days*oneDay)-(hrs*oneHr)-(mins*oneMin))/1000);	
	
			countdownTxt = '<span><strong>' + days + '</strong> days</span>'; 
			countdownTxt += ' <span><strong>' + hrs + '</strong> hours</span>'; 
			countdownTxt += ' <span><strong>' + mins + '</strong> mins</span>';
			countdownTxt += ' <span class="last"><strong>' + secs + '</strong> secs</span>';
	
			if (ems > 0){ 
				$('counter').set('html', countdownTxt);
				showCounter;
			}else {
				$('countdown').destroy();
				$clear(showCounter);
			}
		}).periodical(1000); // run every second
	}
});