Jquery UI Date Picker... only allow Fridays?

I want to only allow users to select Friday开发者_JS百科s. Basically they are choosing the start date for a schedule, and the schedules always must start on a Friday.

I am not really concerned with whether the other days are displayed or not as long as if they are displayed, then they are disabled.

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You can use the beforeShowDate option, like this:

​$("#datepicker").datepicker({
    beforeShowDay: function(date) {
        return [date.getDay() == 5];
    }
})​​​​​;​

You can try a demo here, we're just checking if the .getDay() on the date it's trying to show is 5 (Friday), and if so true is the first element in the array, false otherwise, which disables the date in the picker.