!function () {
    var id = '[id=storageFilesViewerPnl]';
    var bt = '[id$=ForwardBtn]';
    var pages = {};
    var o = document.querySelector(id);

    !function _observe(undefined) {
        var ob = new MutationObserver(function() {
            var imgs = $(id+' img[src*=Pages]:first');
            if (imgs && imgs[0]) {
                var page = imgs[0].src.match(/id=([^&]+)/)[1];
                if (pages[page] == undefined) {
                    pages[page] = true;

                    var next = $(bt);
                    if (next && next[0]) {
                        next[0].click();
                    } else {
                        ob.disconnect();
                        console.clear();
                        console.log("dxo.itemsValue=['" + Object.keys(pages).join("','")+"'];");
                    }
                }
            }
        });

        ob.observe(o, { childList: true, attributes: true, subtree: true, attributeFilter: ['src'] });
    }();

    o.setAttribute('src', true);
}();