Thanks (Bi Jing), You offered the best solution, I tried using all of the code that was offered, but the following code was the only one that it made it work:
$("li:even:odd, li:odd:odd").addClass("test_css");
I also like the fact that it's a minimal amount code, written in one
line.
Thanks to everyone else, you tried to help me, you guys rock.
;)
