function zmiana(nazwa){
	d = document.getElementById(nazwa);
	if(d.getAttribute('style')=="display: none;"){
		d.setAttribute("style", "display: block;");
	}else{
		d.setAttribute("style", "display: none;");
	}
}
function selecturl(s) {
	var gourl = s.options[s.selectedIndex].value; window.top.location.href = gourl;
}