smithaa02 - 2:51 pm on Jan 15, 2013 (gmt 0)
Think Cutts was asked about js menus at one point...he seemed to indicate you're fine as long as you stick to popular menu scripts but there can be problems if you use more obscure ones.
What I interpret from this...is that google handles ul/ol menus with anchors in them just fine (this is the bread and butter js menu). The JS/Jquery & CSS in most cases just rearranges the ul/ol into a the menu you want.
If the js does not reformat a ul/ol (think this is your case) then I think that is where you can get into trouble.