function menu_over(element) { 
	element.style.backgroundImage = 'url(/images/menu_bg_on.gif)'; 
}

function menu_out(element)  { 
	element.style.backgroundImage = 'url(/images/menu_bg.gif)'; 
}

function submenu_over(element) { 
	element.style.backgroundColor = '#858585'; 
}

function submenu_out(element)  { 
	element.style.backgroundColor = '#696969'; 
}

function OtevriFoto(URL, rozmery) { 
	var rozmery, text; 
	NoveOkno = window.open(URL, '_blank', rozmery, 'toolbar=0', 'location=0', 'directories=0', 'status=0', 'menubar=0', 'scrollbars=0'); 
	NoveOkno.focus; 
}

function decision(message, url) { 
	if(confirm(message)) location.href = url; 
}

function isNumberKey(evt) {
	var charCode = (evt.which) ? evt.which : event.keyCode
	if (charCode > 31 && (charCode < 48 || charCode > 57)) return false;
	return true;
}