Hallo,

according to the documentation of org-html-table-row-tags in ox-html.el the following code can be used to assign different CSS classes to alternating rows:

  (setq org-html-table-row-tags
        (cons '(if head
                   \"<tr>\"
                 (if (= (mod nline 2) 1)
                     \"<tr class=\\\"tr-odd\\\">\"
                   \"<tr class=\\\"tr-even\\\">\"))
              \"</tr>\"))

This does not work for me because of these problems:

eval: Symbol's value as variable is void: head
=: Symbol's value as variable is void: nline

My knowledge of elisp is very limited, but I assume fixing these errors would require defining head and a line counter nline around ll. 2976 in ox-html, at least the latter might be simple to fix.

However, I would suggest to implement this differently: have an option "org-html-alternating-table-row-classes" (or similar) that - if not nil - is used for alternating class names. Or - in keeping with hardwired class names like "org-ul" - always use "org-row-odd" and "org-row-even" if "org-html-alternating-table-row-classes" is not nil. Users who would prefer different class names could then still come up with their own definition of org-html-table-row-tags if needed.

Warm regards,
 Stefan
-- 
Dr. Stefan Vollmar, Dipl.-Phys.
Head of IT group
Max-Planck-Institut für neurologische Forschung
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