function clock()
{
	var myDate = new Date();

	hour = myDate.getHours();
	if (hour <= 9)
		hour = "0" + hour;
	
	minut = myDate.getMinutes();
	if (minut <= 9)
		minut = "0" + minut;
	
	second = myDate.getSeconds();
	if (second <= 9)
		second = "0" + second;
	
	document.getElementById('datetime').innerHTML = hour + ':' + minut + ':' + second;
}

function pause(numberMillis) {
  var now = new Date();
  var exitTime = now.getTime() + numberMillis;
  while (true) {
    now = new Date();
    if (now.getTime() > exitTime)
   return;
  }
}

function typeText ()
{
 
	var text = 'Poradnia Dietetyczna Starba3a, ul.Sowińskiego 15a Legionowo, tel. kom.: 0 601 145 366; Vita Med Centrum Medyczne, tel.: 022 765 44 40, ul. Dobra 1a, Chotomów';
	var textLen = text.length;
	var len = document.getElementById('my_java').innerHTML.length;
	if (len < textLen)
		len++;
	else
	{
	 	pause(300)	;
		len = 1;
	}
	
	document.getElementById('my_java').innerHTML = text.substring(0, len);
}

function showPoster() {

	document.getElementById('overlay').style.display = 'block';
	document.getElementById('poster').style.display = 'block';
}

function hidePoster() {

	document.getElementById('overlay').style.display = 'none';
	document.getElementById('poster').style.display = 'none';
}