var days = new Array(8);
days[1] = "Domingo";
days[2] = "Lunes";
days[3] = "Martes";
days[4] = "Miércoles";
days[5] = "Jueves";
days[6] = "Viernes";
days[7] = "Sábado";

var months = new Array(13);
months[1] = "Enero";
months[2] = "Febrero";
months[3] = "Marzo";
months[4] = "Abril";
months[5] = "Mayo";
months[6] = "Junio";
months[7] = "Julio";
months[8] = "Agosto";
months[9] = "Septiembre";
months[10] = "Octubre";
months[11] = "Noviembre";
months[12] = "Diciembre";

var dateObj = new Date()
var dia = days[dateObj.getDay() + 1]
var mes = months[dateObj.getMonth() + 1]
var data = dateObj.getDate()
var ano = dateObj.getFullYear()
document.write(dia + ", " + data + " de " + mes + " de " + ano)