Te paso el script.
<head>
<script type="text/javascript">
var dayEspArray = new Array("Domingo","Lunes"," Martes","Miércoles",
"Jueves","Viernes","Sábad o");
var monthEspArray = new Array("Enero","Febrero"," Marzo","Abril","Mayo",
"Junio","Julio","Agosto&q uot;,"Septiembre","Octubre",
"Noviembre","Diciembre");
var mydate = new Date();
var year = mydate.getYear();
if (year < 1000)
year+=1900;
var day = mydate.getDay();
var month = mydate.getMonth();
month2 = month;
var daym = mydate.getDate();
if (daym < 10)
daym="0"+daym;
month++;
if (month < 10)
month="0"+month;
var fechaDia = dayEspArray[day] + " " + daym + " de " + monthEspArray[month2] + " de " + year;
</script>
</head>
<body>
<script language="JavaScript">
document.write(fechaDia);
</script>
</body>
Saludos
