function countdown(fDiv, fTime){

//
// fDiv is the 'id' for a <div></div> html tag
// fTime is the number of miliseconds to countdown ...let's say 10000 for 10 seconds
//
	
	var cd=new Date();
	var ed=new Date(cd.getTime() + fTime);
	var out = "";

	amount=Math.floor((ed.getTime()-cd.getTime()));
	
	if (amount > 0) {

		days=Math.floor(amount/86400);//days
		amount=amount%86400;
		
		hours=Math.floor(amount/3600);//hours
		amount=amount%3600;

		mins=Math.floor(amount/60);//minutes
		amount=amount%60;
		
		secs=Math.floor(amount);//seconds
		
		if(days != 0){out += days +" nap"+", ";}
		if(days != 0 || hours != 0){out += hours +" óra"+", ";}
		if(days != 0 || hours != 0 || mins != 0){out += mins +" perc"+", ";}
		out += secs +" mp";
		
		document.getElementById(fDiv).innerHTML = out;
		
	} else {
	
		document.getElementById(fDiv).innerHTML = ""; 
	
	}
	
	setTimeout("countdown('"+fDiv+"',"+(fTime-1)+")",1000);
}