WebSAT uses a set of heuristic rules to evaluate the use of tags in web page design. Note: These rules do not
form a comprehensive set of guidelines. However, they are a sample set of typical rules to demonstrate the feasibility
(and limitations) of an automatic checker. The rules are grouped into six categories as follows (click on a category's link
for a more extensive discussion on that category):
It is important that all users, regardless of physical abilities be able
to view public websites. Differences in web browsers and hardware
capabilities might also limit access for some viewers. WebSAT uses the following
rules to test for accessibility:
Include "alternative text" for images, even when not used as links.
Include "alternative text" for images used as links.
Include "alternative text" when using java applets.
Include text anchors or links for image maps.
Include the "noframes" option when using frames.
When specifying colors, use the RGB hexidecimal values. This
helps to insure proper color recognition by any browser which
does not recognized specified "color names".
Combine the use of BG color and TEXT color attributes. Do not
use them alone.
If forms are used on a website, care should be taken so that users are
able to easily fill in information, erase information, and submit
information. WebSAT uses the following
rules to test for how forms have been implemented:
The form should include a functionality for returning the completed form.
The form should include a button that is clearly labeled "Send" or "Submit"
for delivering responses.
The form should include a functionality for clearing or resetting the form.
The form should include a button that is clearly labeled "Clear" or "Reset"
for clearing current information from the form.
Users are impatient. It is important that they can get to the necessary
information in your website quickly. In this section, we check that
all has been done to speed up performance so that long delays do not
affect the usability of your site. WebSAT uses the following
rules to test for performance:
The total amount of graphics should be 30K or less.
Height and width specifications should be given for images.
Images should be in either GIF or JPEG format.
Banner sizes should be in the 468 X 60 pixels range.
Users want timely information and links that really connect to other
information. This is not just an issue of maintenance. It is also a
design issue. In this section, we check that your site can be easily
maintained. WebSAT uses the following
rules to test for maintainability:
Most websites do not come with a map. Users have to create their own
model of the site as they search for information in that site. It is
important that links be descriptive so that users have some idea of what
to expect if they follow a given link and how to get back to pages they
previously visited. WebSAT uses the following
rules to test for navigation:
Each page should contain at least one link.
Links should be displayed in the default browser colors.
Links should be descriptive of what the user will find upon visiting.
It is important that users can easily read the important information on
your web page without distractions. While graphics and animation add
interest, too much of a good thing can quickly become distracting.
Information on your web pages should be arranged so that users do not
have to scroll many times to see the full text. As with printed text,
the density of information is also a consideration in ease of reading.
WebSAT uses the following
rules to test for readability:
Try to limit the density of the web page.
Limit scrolling text, blinking text,and marquee style text on your web pages.