function akce (slozka) {

	obr = "tlac_"+slozka;

	if (document.getElementById(slozka).style.display=='none') {
	document.getElementById(slozka).style.visibility='visible';
	document.getElementById(slozka).style.display='block';
	document.images[obr].src='img/minus.gif';
	
	} else {
	document.getElementById(slozka).style.display='none';
	document.getElementById(slozka).style.visibility='hidden';
	document.images[obr].src='img/plus.gif';
	}

}


function OpenPictureWindow(theURL,winName,x,y) { //v2.0
vyska = screen.height;
sirka = screen.width;
var levy = (sirka - x)/2;
var horni = (vyska - y)/2;
window.open(theURL,winName,"width="+x+",height="+y+",left="+levy+",top="+horni);
}

function oknonew(id) { //v2.0
vyska = screen.height;
sirka = screen.width;
var levy = (sirka - 500)/2;
var horni = (vyska - 300)/2;
window.open("news.php?id="+id,"new","width=500,height=300,left="+levy+",top="+horni+",scrollbars=yes");
}

function oknogalerie(id) { //v2.0
vyska = screen.height;
sirka = screen.width;
var levy = (sirka - 700)/2;
var horni = (vyska - 180)/2;
window.open("galerie.php?id="+id,"new","width=700,height=180,left="+levy+",top="+horni+",scrollbars=yes");
}


function validate(formular)
{

re = new RegExp("^[^.]+(\.[^.]+)*@([^.]+[.])+[a-z]{2,4}$");

	if (formular.jmeno.value=="")
	{
		alert("\n\nPLEASE FILL THE NAME\n\n");
		formular.jmeno.focus();
		return false;
	}
	else if (formular.email.value!="")
	{
		if (!re.test(formular.email.value)) {
		alert("THE E-MAIL IS IN WRONG FORMAT");
		formular.email.focus();
		return false;
		} 
		else return true; 
	}
	

	else if (formular.zprava.value=="")
	
	{
		alert("\n\nPLEASE FILL THE MESSAGE\n\n");
		formular.zprava.focus();
		return false;
	
	}
	
	else
		return true;

}