In the example from CSS Control Toolkit I found this synax:

 

.SimpleEntertainmentMenu ul.AspNet-Menu li.AspNet-Menu-Leaf a,

.SimpleEntertainmentMenu ul.AspNet-Menu li.AspNet-Menu-Leaf span

{

background-image: none;

}

Not  sure about the first line. I understand the fist word starting with "." is a class name, "a" is an element but what is "ul.AspNet-Menu li.AspNet-Menu-Leaf". I have no idea. I never saw this kind of CSS syntax. i have checked google, but could not find anything like that...

.SimpleEntertainmentMenu ul.AspNet-Menu li.AspNet-Menu-Leaf a

Some element assigned a class name of: SimpleEntertainmentMenu

That contains a ul element assigned a class name of: AspNet-Menu

that contains a li element assigned a class name of: AspNet-Menu-Leaf

that contains an anchor

Thanks. One more i have:

.menu :hover > a b
{
color:#000;
background: transparent url(drop/midb.gif);
border-bottom-color:#ccc;
}

.menu   some class named menu
:hover    that contains something being hovered over (usually an anchor)
>  a       that has a direct child element of an Anchor
    b       that contains something wrapped with <b></b>

Thank you very much. Sees that you know CSS very well. What is the best site to learn CSS?

i didnt learn from any site so i cant really point you to one that teaches css.
i learned by trial an error and by googling for tips.

however, i did just stumble across this interesting little site: http://www.cssplay.co.uk/

Thanks, it just seems that coding each page for CSS is very time cosuming. Do you use any tools for that? Seems like .NET editor is not very CSS fiendly as it creates styles embeded in HTML page as oposed to put it into a seperate file.

I wonder what are the best practsises/tools for .NET developers available to use CSS...

There are lots of ways to learn CSS.  After a while, you tend to discover that you should keep things really simple, avoid hacks and learn the basics really, really well.  A great book to get you started is by a fellow named Eric Meyer who is well known in the CSS community.  Check out http://www.ericmeyeroncss.com/about-book.html.