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 of day names
var dayNames = new makeArray(7);
dayNames[0] = "Domingo";
dayNames[1] = "Lunes";
dayNames[2] = "Martes";
dayNames[3] = "Miércoles";
dayNames[4] = "Jueves";
dayNames[5] = "Viernes";
dayNames[6] = "Sábado";
var now = new Date();
var year = now.getYear(); 
if (year < 2000) year = year + 1900;
function makeArray(len) 
{
  for (var i = 0; i < len; i++) this[i] = null;
 this.length = len;
 }
 <!-- 
document.write( dayNames[now.getDay()] + " " + now.getDate() + " de " + monthNames[now.getMonth()] + "  " +" de " + year);