//
// addLoadEvent()
// Adds event to window.onload without overwriting currently assigned onload functions.
// Function found at Simon Willison's weblog - http://simon.incutio.com/
//
function addLoadEvent(func)
{	
	var oldonload = window.onload;
	if ( typeof(window.onload) != "function" ) window.onload = func;
	else
	{
		window.onload = function() { oldonload(); func(); }
	}

}

// formular kontakty
function submitKontakt()
{
	var osoba = document.getElementById("osoba").value;
	var email = document.getElementById("email").value;
	var telefon = document.getElementById("telefon").value;
	
	if ( osoba == "" || email == "" || telefon == "" )
	{
		alert(text["form_kontakty_vyplnte"]);
		return false;
	}  
	return true;
}

// znacky

var znacek = 3;
var znacka = 1;

function overSipka(e)
{
	e.src = e.src.replace(".gif", "_over.gif"); 
}
function outSipka(e)
{
	e.src = e.src.replace("_over.gif", ".gif"); 
}
function rotujZnacky()
{
	var znackyInterval = window.setInterval(znackaDalsi, 5000);
}

function znackaPredchozi()
{
	document.getElementById("zn" + znacka).style.display = "none";
	znacka--;
	if ( znacka < 1 ) znacka = znacek;
	document.getElementById("zn" + znacka).style.display = "block";
	document.getElementById("lista_poradi").innerHTML = znacka;
}
function znackaDalsi()
{
	document.getElementById("zn" + znacka).style.display = "none";
	znacka++;
	if ( znacka > znacek ) znacka = 1;
	document.getElementById("zn" + znacka).style.display = "block";
	document.getElementById("lista_poradi").innerHTML = znacka;
}

// menu
function menuOver(eA)
{
  //eA.style.backgroundImage = eA.style.backgroundImage.replace(".gif", "_ovr.gif");
  eA.className = "menuovr";
}
function menuOut(eA)
{
  //eA.style.backgroundImage = eA.style.backgroundImage.replace("_ovr.gif", ".gif");
  eA.className = "";
}