Setup defaultDate from altField on jQuery UI datepickers.

default-date-datepicker

/**
 * Setup datepickers
 */
$('.datepicker').each(function ()
{
    var alt_field = $(this).data('alt-field');
    var altField = $(alt_field);
    var defaultDate = new Date();

    if (altField.val() != '') {
        var date_parts = altField.val().split('-');
        defaultDate.setFullYear(date_parts[0], date_parts[1] - 1, date_parts[2]);
    }

    return $(this).datepicker({
        dateFormat: 'DD d, MM yy',
        altFormat: 'yy-mm-dd',
        altField: alt_field
    }).datepicker('setDate', defaultDate);
});