Help for the navigation menu

[Fabx]

Hallo,
i am developing a little web site in asp.net and I am new for asp.net.

I have written the web.sitemap file

item1
- subItem11
- subItem12
- subItem13

item2
- subItem21
- subItem22

item3
- subItem31
- subItem32


I'd like to develope 2 usercontrol for 2 type the menu:

1 horizontal menu with
item1 | item2 | item3

2 vertical menu with the subItem that selected item
- subItem11
- subItem12
- subItem13


Example:
If I click the item1 in the first menu, the second menu views
- subItem11
- subItem12
- subItem13

If I click the item2 in the first menu, the second menu views
- subItem21
- subItem22

I'd like that the item and subItem selected use different CSS class.

Can you help me?
Thank's
FB