refined-loading-popup.js

    (function ($) {
        var popupID = 406, // Popup ID # found in the "All Popups" screen
            cookie_name = 'loading-popup', // the cookie name in the Popup Editor
            close_delay = 500, // (measured in milliseconds) - .5 seconds after page load completes
            // --------------------------------
            // --   Don't touch below here   --
            // --------------------------------
            popup = '#pum-' + popupID,
            $html = $('html'),
            classes = 'pum-open pum-open-overlay pum-open-scrollable',
            regex = new RegExp(cookie_name + '=');
    
        if (document.cookie.match(regex)) {
            $('<style>' + popup + ' {display: block;}</style>').appendTo($('head'));
            $html.addClass(classes);
    
            $(document).ready(function () {
                setTimeout(function () {
                    $(popup).fadeOut(function () {
                        $html.removeClass(classes);
                    });
                }, close_delay);
                $.pm_remove_cookie(cookie_name);
            });
        }
    
    }(jQuery));