Autopopulate datepicker fields based on another datepicker field

Autopopulate datepicker fields based on another datepicker field

I have form with multiple datepicker fields. Monday through Sunday. I would like to populate Tuesday through Sunday's dates based on Monday's selection. Here's where I have gotten with no luck:

$(document).ready(function () {
if ($('#form_44084').length) {
var DAYS = ['#element_2_datepick', '#element_3_datepick', '#element_4_datepick', '#element_5_datepick', '#element_6_datepick', '#element_7_datepick'];
$('#element_1_datepick').datepick({
    onDate: function(date) {  return {selectable: date.getDay() === 1}; }, // Mondays only
    onSelect: function(dates) {
        var day = dates[0]; // Selected Monday
        for (var i = 0; i < 6; i++) {
            day.setDate(day.getDate() + 1); // Next day
            $(DAYS[i]).val($.datepick.formatDate('mm/dd/yyyy', day)); // If straight input fields OR
            $(DAYS[i]).datepick('setDate', day); // If other datepicker fields
        }
    }
});
}
});

Can anyone give me some insight into why this isn't working?