function showtime() {
	dnesek = new Date();
	BigDay = new Date("July 18, 2010 00:00")
	msPerDay = 24 * 60 * 60 * 1000 ; 
	timeLeft = (BigDay.getTime() - dnesek.getTime()); 

	if(timeLeft < 0) 
		timeLeft = 0;

	e_daysLeft = timeLeft / msPerDay; 
	daysLeft = Math.floor(e_daysLeft); 
	e_daysLeft = timeLeft / msPerDay; 
	daysLeft = Math.floor(e_daysLeft); 
	e_hrsLeft = (e_daysLeft - daysLeft)*24; 
	hrsLeft = Math.floor(e_hrsLeft); 
	minsLeft = Math.floor((e_hrsLeft - hrsLeft)*60); 
	hrsLeft = hrsLeft; 
	e_minsLeft = (e_hrsLeft - hrsLeft)*60; 
	secLeft = Math.floor(e_hrsLeft); 
	secLeft = Math.floor((e_minsLeft - minsLeft)*60); 
	secLeft = secLeft; 

	
	document.getElementById("days").innerHTML=daysLeft+"<br>dní";
	document.getElementById("hours").innerHTML=hrsLeft+"<br>hod";
	document.getElementById("mins").innerHTML=minsLeft+"<br>min";
	document.getElementById("sec").innerHTML=secLeft+"<br>sec";
}