[jQuery] setting default value for datepicker.

[jQuery] setting default value for datepicker.


today I'm learnig jquery. I downloaded jquery-1.3.min.js and jquery-ui-
personalized-1.6rc5.min.js with everything.
I'm trying to get the calendar working. so far I have most elements
that I need:
start on saturday
formatted date
select year/month
display with image and textbox focus
there are 2 things remaining.
1. disable specific days (if date != saturday, disable)
2. set the default date.
the getDate and setDate do not seem to work at all. here is my code:
<html>
<head>
<script src="jquery-1.3.min.js"></script>
<script src="jquery-ui-personalized-1.6rc5.min.js"></script>
<script>
$(document).ready(function() {
        var birthday = new Date(1980, 11, 25);
        $('#selected_date').datepicker({
            setDate:birthday,
            dateFormat:"mm-dd-y",
            changeMonth:true,
            changeYear:true,
            firstDay:6,
            showOn: 'both'}
        );
    });
</script>
</head>
<body><input type="textbox" id="selected_date"/></body>
</html>
am I missing something, or is this functionality broken? I'm assuming
when I pass in the setDate property the calendar will show that date
selected and the value will be placed in the textbox.