Disabled and read-only controls

Check this out : https://www.w3.org/TR/html401/interact/forms.html#disabled

Caching a jquery ajax response in javascript/browser

Check this out : http://stackoverflow.com/questions/17104265/caching-a-jquery-ajax-response-in-javascript-browser

Background de site cliquable

Sources :
https://www.h-hennes.fr/blog/2013/10/04/background-de-site-cliquable-en-css/
http://www.h-hennes.fr/demos/habillage/habillage.html
http://www.position-relative.com/tutorials/tute1_css_bg_image.php