function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		preloadFlag = true;
	}
}

function PopUpWindow(cesta,titulek,sirka,vyska)
	{
	window.open(cesta + "","nazev","width=" + sirka + ",height=" + vyska + ",toolbar=no,location=no,directories=no,status=no,scrollbars=no,resizable=yes,copyhistory=no,screenX=50,screenY=50");				
	}
	
function PopUpWindow2(cesta,titulek,sirka,vyska)
	{
	window.open(cesta + "","nazev","width=" + sirka + ",height=" + vyska + ",toolbar=no,location=no,directories=no,status=no,scrollbars=yes,resizable=yes,copyhistory=no,screenX=50,screenY=50");				
	}
	
	
function validate(formular)
{
	if (formular.emil.value=="")
	{
		alert("Please input your E-mail address");
		formular.emil.focus();
		return false;
	}
	else if (window.RegExp)
	{
		re=new RegExp("^[^@]+@[^.]+\..+$");
		if (!re.test(formular.emil.value))
		{
			alert("Your E-mail address is not typed correctly. Please verify it.");
			formular.emil.focus();
			return false;
		}
	}

	else
		return true;
}