First of all I would like to thank you all for your kind contribution.
Things got very complicated, because of all pros and conts, so I thought of having a look again, what W3C recommends.
So I have visited the "HTML Techniques for Web Content Accessibility Guidelines 1.0" here http://www.w3.org/TR/WCAG10-HTML-TECHS/#image-text-equivalent and I was surprised to find there an example, that is 100% identical to one of the images of my site.
I have a magnifying glass image for SEO, and W3Cs example there was: <img src="magnifyingglass.gif" alt="Search">
According to their example, and the advice of Joe Clark about titles: "if |alt| and |title| have the same text, enclose the |title| in brackets", I thought the best solution could be:
<img src="/images/accessibility.jpg" alt="Accessibility" title="[Accessibility]" />
<img src="/images/seo.jpg" alt="Search" title="[Search]" /> <img src="/images/seo.jpg" alt="Usability" title="[Usability]" /> <img src="/images/certificate.jpg" alt="Training" title="[Training]" /> What do you think about this option? Thanks again, John -- John S. Britsios Web Architect & Marketing Consultant Webnauts Net (Main Office) Koblenzer Str. 37A D-33613 Bielefeld Webnauts Net (U.S. Office) 5 Ivanhoe Drive Urbana IL 61802 Email: [EMAIL PROTECTED] Web address: http://www.webnauts.net ****************************************************** The discussion list for http://webstandardsgroup.org/ See http://webstandardsgroup.org/mail/guidelines.cfm for some hints on posting to the list & getting help ******************************************************