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The law about accessible websites came into force on 1st October 1999 (http://www.drc-gb.org/open4all/law/code.asp) and the Code of Practice for this section of the Act was published on 27th May 2002 (http://www.hmso.gov.uk/si/si2002/20020720.htm). This means that the majority of websites are already in breach of the law.Can you be sued?Well, probably. The RNIB claim that they've considered taking up a number of legal cases against organisations with regard to their websites. When they raised the accessibility issues of the website under the DDA, companies have typically made the necessary changes, rather than facing the prospect of legal action.The DRC has now published their findings from their formal investigation into 1000 websites. (http://www.drc-gb.org/publicationsandreports/2.pdf). If your website was included then you will have to start thinking about making it accessible to all web users in the very near future.

What do you need to do to comply?It's widely believed that if, or perhaps more appropriately when, a case makes it to court that the W3C accessibility guidelines will be used to assess a website's accessibility and ultimately decide the outcome of the case. The W3C is the Internet governing body and its web accessibility guidelines can be found at http://www.w3.org/TR/WAI-WEBCONTENT/full-checklist.html.

This argument is a development of the age-old mantra from the accessibility sector that people with disabilities want to use the web in the same way as everybody else - “it is a human right recognised by the UN,” says Abou-Zahra. But he recognizes that businesses in particular will also  be interested in the additional business benefits, especially in the current financial climate.

“With commercial organisations the return on investment is often an important argument. Well, a few years ago, companies might have said ‘how many older people are online?’ but with demographics changing they know the answer. And with the current surge in mobile phone use there is another incentive, since accessible sites work better on mobile phones.”

Another change of style will be a greater separation between the core guidelines and references to specific technologies such as Javascript or browser types, Abou-Zahra says.

“WCAG 1.0 was too  technology-specific. Back then HTML was more dominant, and there was less use of multimedia, but today we have a flurry of technologies such as Ajax, so the first lesson we learned is don’t write for a specific technology. Also, in the days of WCAG 1.0 we had to exclude Javascript because it was not sufficiently standardised and  assistive technology could not handle it consistently, but now that has largely changed so you need to include it, to look at how any technology should be accessible. The requirements - such as tagging images with text - needs to apply to any technology you are using.

accessibility issues with rich internet applications can be characterized as: Providing the semantic structure of page areas and functionality (e.g., navigation, main content, search, etc.) Maintaining accessibility of content that is dynamic and may change within the page (e.g., AJAX content updates) Allowing certain non-focusable page elements to receive keyboard focus (e.g., setting focus to an error message within the page) Providing keyboard and screen reader accessibility with complex widgets and navigation elements (e.g., sliders, menu trees, etc.)

ARIA is being implemented into many scripting libraries (such as jQuery, Dojo, YUI, and GWT). While developers can certainly implement ARIA into their advanced widgets and applications, using ARIA-supported libraries greatly simplifies the process of providing this level of accessibility.

anecdotal evidence suggests that, as soon as you reduce the colour contrast, the reading difficulties suffered by dyslexics are alleviated, to some degree, across the board.

Contrasts that comply with the thresholds can, and do, create very real problems for dyslexics.

t has been my experience that just about every issue within accessible web design is about balance. Skew any one factor too much in favour of a particular user group and you risk disadvantaging another group with opposing needs.

What I am suggesting is that, if a colour theme is chosen that conforms to, or exceeds, the W3C colour difference threshold, an alternative, low contrast style sheet should be provided as standard.

I then suggested that “disability” be defined as an “inability to pursue an activity because of a medically determinable physical or mental impairment.”

suggest that adhering to the Hewlett-Packard colour difference threshold would represent a more balanced approach to the issue of colour contrast. To that end,

I’ve developed an alternative color contrast analyser for people to try.