function MostrarFecha()
//Toma la fecha del sistema, le da formato y la muestra en la página.
{
			var weekdays = new Array(6);
			var months = new Array(11);
			var today = new Date();
			var month = today.getMonth();
			var date = today.getDate();
			var weekday = today.getDay();
			var year = today.getYear();
			if ((navigator.appName == "Microsoft Internet Explorer") && (year < 2000)) year="19" + year;
			if (navigator.appName == "Netscape")year=1900 + year;
			today = null;

			weekdays[0] = "Domingo";
			weekdays[1] = "Lunes";
			weekdays[2] = "Martes";
			weekdays[3] = "Miércoles";
			weekdays[4] = "Jueves";
			weekdays[5] = "Viernes";
			weekdays[6] = "Sábado";
			
			months[0] = "Enero";
			months[1] = "Febrero";
			months[2] = "Marzo";
			months[3] = "Abril";
			months[4] = "Mayo";
			months[5] = "Junio";
			months[6] = "Julio";
			months[7] = "Agosto";
			months[8] = "Septiembre";
			months[9] = "Octubre";
			months[10] = "Noviembre";
			months[11] = "Diciembre";
			
			//document.write(weekdays[weekday] + " " + date + " de " + months[month] + " de " + year);
			document.write(date + " de " + months[month] + " de " + year);
}