function brillo(name, hacer) {
	if (hacer.length <= 0) {
		imgname = "images/" + name + "o.gif";
		document [name]. src = imgname;
	}
}

function normal(name, hacer) {
	if (hacer.length <= 0) {
		imgname = "images/" + name + ".gif";
		document [name]. src = imgname;
	}
}