Web Quality - Accessibility (WAI)
An accessible web site is a web site that can be used by
disabled users.
Disabled users are users with disabilities or bad user
conditions.
The Web Accessibility Initiative - WAI
WAI (created by W3C, in 1997) is a set of
guidelines intended for web developers, authors, and designers-
about how to make the web content accessible to people with disabilities.
The goal of these guidelines is accessibility, but they will also help make
web contents available to more browsers (voice browsers, cell phones, hand-held
devices), and to more users working in difficult environments (hands-free,
strong light, darkness, bad sight, heavy noise).
Is WAI important?
Yes it is.
Millions of people with disabilities are surfing the Internet every day, and
even more millions are using poor browser equipment, or working under difficult
user environments.
If your website lacks features, such as resizable fonts, or images with no descriptions, these people will not be able to access your
information.
 In fact: Your site
violates the rights of these people.
Some reasons for making your site more accessible:
- It will improve your reputation and image
- It will improve your customer satisfaction
- It will increase your number of visitors
- It will let your visitors stay longer at your site
- It will increase the number of returning visitors
- It will make your site more usable also for people with no disabilities
- It will make your site more usable for users with images turned
off
- It will make your site more usable for people with older equipment
- It will let you reach the fastest growing population: older people
Use an adjustable font size
Use only relative font sizes, and let the user be able to use the browser
menu (View - Text Size) to change the default text size.
Can you read this?
Can you read this?
Can you read this?
Can you read this?
To change the font
size, select view - text size - in your browser menu.
Use the "alt" attribute
The alt attribute allows you to provide an alternative text for an image.
Example:
| <img src="images/banana.jpg" alt="Banana" /> |
Sometimes a web browser will not display your images. The reason could be one of
many:
- The user has turned off the display of images
- The browser is a mini browser without image display
- The browser is a voice browser
If you use the "alt" attribute, most browsers will at least display, or read the
"alt" text.
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