How do you make buttons highlight?

[soladragon]

Hey I want to make my buttons highlight like the ones on this site?

http://www.tribewanted.com/ how do I do it?

[Wickham]

There are some examples on these links:-
http://www.cssplay.co.uk/menus/drop_examples.html
http://www.dynamicdrive.com/style/csslibrary/category/C1/