For example:
\(setq org-html-table-row-tags
- (cons '(cond (top-row-p \"<tr class=\\\"tr-top\\\">\")
+ (cons \\='(cond (top-row-p \"<tr class=\\\"tr-top\\\">\")
(bottom-row-p \"<tr class=\\\"tr-bottom\\\">\")
(t (if (= (mod row-number 2) 1)
\"<tr class=\\\"tr-odd\\\">\"