var nb_ile = 0;
function nb_laduj_o(id){

	for (i=0; i<nb_ile; i++){
		document.getElementById("nb_o_"+i).style.display = 'none';
		document.getElementById("nb_n_"+i).style.display = 'block';
		document.getElementById("nb_p_"+i).style.display = 'none';
	}
	document.getElementById("nb_n_"+id).style.display = 'none';
	document.getElementById("nb_o_"+id).style.display = 'block';
	document.getElementById("nb_p_"+id).style.display = 'block';
}