function makeArray(len) 
{
for (var i = 0; i < len; i++) this[i] = null;
this.length = len;
}

// Array de los meses

var monthNames = new makeArray(12);
monthNames[0] = "Enero";
monthNames[1] = "Febrero";
monthNames[2] = "Marzo";
monthNames[3] = "Abril";
monthNames[4] = "Mayo";
monthNames[5] = "Junio";
monthNames[6] = "Julio";
monthNames[7] = "Agosto";
monthNames[8] = "Septiembre";
monthNames[9] = "Octubre";
monthNames[10] = "Noviembre";
monthNames[11] = "Diciembre";

//Array de los dias

var dayNames = new makeArray(7);
dayNames[0] = "Domingo";
dayNames[1] = "Lunes";
dayNames[2] = "Martes";
dayNames[3] = "Mi&eacute;rcoles";
dayNames[4] = "Jueves";
dayNames[5] = "Viernes";
dayNames[6] = "S&aacute;bado";

var fecha = new Date();
var diasemana = fecha.getDay(); //dia de la semana
var dia  = fecha.getDate();//dia del mes
var mes = fecha.getMonth();
var yy = fecha.getYear();
var ano = (yy < 1000) ? yy + 1900 : yy;

document.write(dayNames[diasemana] + ",<br>" + dia + " de " + monthNames[mes] + " de " + ano);