Jquery :: DatePicker - Just Want To Select Mondays?

I an using the datepicker, [URL]. Does anybody know if there is a way for me to configure this so it will only show Mondays? Basically I want a user to select a date, but the date must be a monday. I am using the following code

Code:
$(function() {
$('#inputdate').datepicker({
changeMonth: true,
changeYear: true,
selectWeek:true
});
$('#inputdate').datepicker('option', {dateFormat: 'dd/mm/yy'});
});

This works fine for everydate. I recently found this piece of code, and I want to know how to integrate this code with the code above.
Code:
onlyMondays: function(date){
var day = date.getDay();
return [(day == 1), ""]
}