function zwijanieListy() {

	var lista1 = document.getElementById('kierunki');
	var lista2 = document.getElementById('kierunki1');

	if(lista1.style.display=="block") {
		lista1.style.display = "none";
		lista2.style.display = "block";
	} else {
		lista1.style.display = "block";
		lista2.style.display = "none";
	}
}

function czysc() {
	
	var inp = document.getElementById('ucz_button');
	inp.value='';
}

function body_bg() {
	var body = document.getElementById('body');
	body.style.background='';
}