Anchor images - pixel sized & alt text

Hi everyone,

Wanted to say thanks for the previous help received and that I have been
making headway auditing the webpages that have been tasked to me.
Question about anchor images and alt text. I received this as some of the
known problems:

*Success Criteria 1.1.1 Non-text Content (A)*

Check 7: Image used as anchor is missing valid Alt
text.<http://achecker.ca/checker/suggestion.php?id=7>

*Repair: *Add Alt text that identifies the purpose or function of the
image.

*Line 84, Column 13*:

<img src="/jjj/img/lp/pixel.gif" class="d_nb_s" alt="" />

The image itself is 1px and is used as an anchor for a link I believe. In
this situation is alt text really useful? I have read somewhere that in
this particular situation anchor images shouldn't even be used. What
exactly is the proper procedure here?


Any explanation would be greatly appreciated so I can pass on to the
programmers. I hope this wasn't too confusing.


Regards,

-PJ