The websites designed nowadays must be responsive enough on almost all platforms (operating system-Android, Blackberry, iOS, Mac, etc.), browsing applications (Firefox, IE, Chrome, Safari, Opera. etc.) and devices (mobiles, tablets, computer systems). This means that the websites created must be independent of all these factors, and that it should respond to all of them. This is indeed extremely important in todays digital world as evolutions are at the peak, which has made it a bit difficult to keep pace with the endless new resolutions and devices coming every day. This explanation can be encompassed in the term Responsive Web Design (RWD).