Design, develop and maintain accessible documents for a semantic web


The Checky Team develops this web site with newest Standards and guidelines, hopefully accessible to all users with all devices. Please use our Help index for a quick overview.

Help index


We use XHTML 1.0 Strict and Cascading Style Sheets level 2.0 W3C® Standards for web site development. This is a requirement for accessibility.



We hope we implement all Standards and guidelines to reach WAI Triple-A compliance for this web site. We use different Browser, Checky and some more useful extensions for web site analysis.

W3C WCAG 1.0


Most users browse the web with Microsoft® Windows Internet Explorer as standard Browser. But we know there are tendencies for alternatives. Mozilla, Netscape and Opera have a lot of brand new interesting functions. We highly recommend Firefox with many more useful extensions. For Microsoft® Windows Internet Explorer user, we highly recommend the Web Accessibility Toolbar.


Browser supporting CSS 2.0 media elements automatically choose the best Stylesheet for your device. Mobile devices only supporting XHTML Mobile Profile can point their Browser to the mobile version of this web site.

HTML Link elements

At this time only Lynx, Mozilla and Opera supports this function without extensions. Firefox can be easily extended with Link Toolbar. With Link elements you have a quick access to the main areas of this web site (Table 1). A web site round trip is available through next and previous definitions in following order:

  1. Extension
  2. About
  3. Versions
  4. Search
  5. Help
  6. Site Map
Table 1 - HTML Link elements
Link Element Area
Start Checky Home
Up Checky Home
Previous Previous chapter in order
Next Next chapter in order
Search Web Site Search
Help Web Site Help
Content Web Site Map
Authors Web Site About#Checky Team
Copyright Web Site About#Copyright / License
Other versions

Page structure and navigation

All pages of this web site have a 5 area layout.

Document Navigation

This navigation is only visible in layouts without Stylesheets, for example users with assistive technologies like screen reader. Hyperlinks to Content (function key X) and Navigation (function key Y) of web site.

Home navigation

Hyperlink to Home page of web site (function key C).

Navigation to main areas of web site.


Real information of document.

Copyright information.

Function keys

Please use Table 2 - unction keys in Table 2 in combination with your Browser specific control key.

Table 2 - Function keys
Area Function key
Content X
Navigation Y
Home 1
Extension 2
Downloads 3
Screens 4
Project 5
Web Site Search 7
Web Site Help 8
Web Site Map 9
First input field in Search form Z
Submit Search form W

Tab order

All elements for web site navigation and control have a fix tab order.

  1. Skip to main content
  2. Skip to navigation
  3. Checky Home navigation
  4. Skip navigation
  5. Extension
  7. Screens
  8. Project
  9. Web Site About
  10. Web Site Versions
  11. Web Site Search
  12. Web Site Help
  13. Web Site Map
  14. Skip content
  15. Hyperlinks in content of page
  16. Copyright
  17. Checky Team

Change font size

Please contact your Browser help for more information about how to change the font size or this little summary:

Change page layout

Please read your Browser Help about how to change Stylesheets. For Microsoft® Internet Explorer users we recommend the Web Accessibility Toolbar. For Mozilla based Browser a Web Developer Toolbar extension is available with this functionality.

Pictures and graphics

We describe images and graphics in the alt attribute of the img element in more detail.


We use tables only for tabular data presentation and not for document layout. A summary and caption provides more information about table of content.

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