function show() {
	document.getElementById("show").style.display="block";
}
function hide() {
	document.getElementById("show").style.display="none";
}
function dropdown() {
	document.getElementById("oferta").style.display="block";
	document.getElementById("oferta-1").className="oferta-a";
}
function dropup() {
	document.getElementById("oferta").style.display="none";
	document.getElementById("oferta-1").className="oferta";
}