The numerous web accessibility guidelines via WCAG, ISO and Section 508 have promoted
to ensure accessible online materials. WCAG 2.0 has significant to meet the requirement of end
people more than the ISO 9241:151 and Section 508 [22]. Web Content Accessibility Guidelines
(WCAG) 2.0 promises to be more accessible to people with disabilities according to four principles:
perceivable, operable, understandable and robust [5]. “Perceivable” means web contents and user
interface modules which must be offered to people as obvious objects. “Operable” refers to the
user interface modules and navigation components which should be designed in a way that they
work properly. “Understandable” is about the design of a website with a friendly version. “Robust”
refers to the capacity of website must be interpreted by a variety type of user agents. Each
principle is divided into success criteria which offer three conformance levels: A, AA, AAA