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Creating Accessible Websites
Bethany Antonio
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Creating Accessible Websites
By Bethany Antonio
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An accessible website is one that allows people with visual, aural, or physical
disabilities full access to the information and services available in the same way
as able-bodied people.
Is It Worth The Effort?
In the United States around 53 million people have some form of disability with
two-thirds of those having a severe disability. About 1 in 10 men are fully or
partially colour blind.
You probably already spend much time and effort ensuring your website displays
perfectly in a broad range of browers, you probably spend time ensuring your
colour scheme and images look great in a range of display resolutions and how
many hours do you put in ensuring your website is indexed by all the major
search engines?
So with all this effort, why do so many web designers ignore the needs of those
who may have difficulty using a mouse or may suffer from one of the many visual
disorders?
The answer is that building an accessible website is considered to be
difficult, time-consuming and simply not worth the effort. This is not true, creating
an accessible website is relatively easy and will allow a greater number of people
access to your website.
Simple Ways To Improve Your Website Accessibility
These are some simple steps you can implement today to improve the
accessibility of your website.
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Colour And Contrast
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Many people need extreme contrast between the text and background colour in
order to be able to read your text. If your text is dark blue, avoid using a light blue
background colour.
Using colour to convey information or request an action from the user should also
be avoided, for example telling someone to 'clïck the red button to continue' is
not much help to a person who cannot distinguish red colours. It seems obvious,
but it's overlooked on many thousands of websites.
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Font Sizes
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Font sizes should be relative rather than absolute. Absolute font sizes, those
measured in points or pixels should be avoided as they prevent the visitor from
resizing text. If someone cannot read your page they are simply going to leave.
Relative font sizes allow your visitors to display the text on your website in a size
that suits them best. These font sizes can be specified as a percentage, for
example the base font for a web page may be 100%, headers could be 120%
and so on.
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Images
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All images on your website should be accompanied with additional text
information describing what the image contains. You do this with the alt attribute
of the img tag. For example...
You should avoid the use of transparent images spacer images for formatting.
You can achieve the same layout precision by using cascading style sheets
(CSS). Do a quick search for 'style sheets' for a wealth of information and
tutorials.
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Using Tables For Layout
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Almost all websites use tables to a layout a page. Tables are easy to understand
and achieve the desired layout quickly and easily. However, you should avoid
them as a layout tool as much as possible.
Tables can cause the size of your pages to increase dramatically slowing
download times, they often require the use of transparent images to achieve the
proper layout and they make it extremely difficult for screen readers to convey
the information on a page correctly to their users. Screen readers are programs
which read out the information on a webpage to someone who cannot see that
information for themselves.
Rather than using tables to format your pages you should start using CSS-based
layouts. CSS offers you greater precision when laying out your pages, decreases
the amount of HTML required for formatting and makes it much easier for screen
readers to interpret your pages correctly.
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Access Keys
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Access keys are basically keyboard shortcuts that are primarily designed to help
those people who have difficulty using a mouse.
You can assign an access key to several HTML elements, however the first one
you should consider is the anchor element. Here's an example:
Homepage
About Us
Search Page
Then when a Windows user visits your website they can access the home page
by pressing ALT + h, the about page by pressing ALT + a and the search page
by pressing ALT + s. This simple feature can dramatically improve the usability of
your website for people with limited mobility.
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Provide A Text Only Version
===========================
A text-only version of your website can help users with visual disabilities.
However, unless your content is stored in a database, creating a text only version
doubles your workload and makes it more difficult to update your content.
This is where the Betsie parser is useful. Betsie, developed for the BBC website
is a PERL script which produces a simplified text only version of a web page that
allows text-to-speech converters and screen readers to correctly read out the
contents of the page. Betsie also allows those with visual impairments to read
computer screens easier. Find out more about Betsie
(http://www.bbc.co.uk/education/betsie/index.html).
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In Summary
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Of course, there are many more enhancements you can make to your website to
ensure it is truly accessible, but implementing these simple steps will start you on
your way in no time. An accessible website with good navigation, less html and a
consistent, logical structure will not only benefit those with a visual, aural, or
physical disabilility but will also help your content to be more easily indexed by
search engines.
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About The Author
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Bethany Antonio is the web designer for UK Sprite Search (uksprite.com), a
British based search engine which offers an alternative to pay-per-click.
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