/**
 * Drupal AJAX framework command.
 */
Drupal.ajax.prototype.commands.bookingAjaxCheckboxes =  function(ajax, response, status) {
    jQuery(function($) {
        var arr = $.parseJSON($('input#' + response.formDataElement).val())
        $('#' + response.formName).find(':checkbox[name^="' + response.checkboxName + '"]').each(function () {
            //.prop() doesn't exist in Drupal's old version of jQuery so use .attr() instead
            $(this).attr("checked", ($.inArray($(this).val(), arr) != -1));
        });
    });
}