asp:Menu control - setting the style of the selected item in the navigation

[RJN]

Hi

I'm using the asp:Menu control in the sharepoint master page for
displaying the site navigation. The site navigations are getting
displayed. On clicking one of the menu items in the navigation, I want
to change the style of the selected menu item so that it stands out as
selected. Can anyone help me on this? I've tried using
selecteditemstyle, but it didn't work.

Thanks