Thanks for mentioning this menu. I was struggeling with a YUI menu of Yahoo with a size of 100kb+ :o

If that's the case, and you aren't going to use the sub menus and dropdown menus, why are you trying to implement the YUI code instead of going for a CSS menu alone? (including some IE bugfixes)

Basically it's nothing more than a horizontal list you've created, similar to the list feature from the vB text editor (also pointing to the link above)

https://vborg.vbsupport.ru/external/2011/08/28.gif

--------------- Added [DATE]1230517165[/DATE] at [TIME]1230517165[/TIME] ---------------

As I'm receiving this notice when trying to reply a pm I guess this would be the best place to post it.
First I'll have to admit I'm not a coder, nor am I a designer and therefore I can't tell this to be a 100% correct.

YUI, CSS, and Javascript are 3 seperate things.
CSS does the styling, whilst YUI and Javascript (in this case) manage the way how things are being displayed.
In this case YUI manages how how the dropdown menus fold down, or how the sub menus would open.
Javascript could be used to fixed the IE bug with some browsers.

When using a CSS menu using the vBulletin dropdown menus and using the Javascript IE bugfix the worst thing that could happen is, when a user would disable the use of Javascript, that a user complains they're seeing your navbar as a list
- test1.html
- test2.html
- test3.html

instead of
- test1.html - test2.html - test3.html

Or the dropdown menu would simply not work at all and you'd be directly linked to the main page ie. search.php
This however goes for the stock vB style as well, and therefore I don't really see a big difference.

As mentioned at the beginning, I'm not a designer, therefore feel free to confirm my reply before implementing it into your own board.