Html5 script src

Efficiently load JavaScript with defer and async - Flavio Copes

HTML5 & Flash Player . HTML Only JavaScript/Placing the code - Wikibooks, open books for an

Всем привет! Решил заняться оптимизацией сайта, в шапке нашел такую строчку:
Thank you. The Mailman is on His Way :)
Sorry, don't know what happened. Try later :(