Does CSS have a selector for selecting when in more than one class?

Question

I have the following:

<a class="nav disabled">Test</a>

Is there some way I can specify the background-color if the address has BOTH the "nav" and "disabled" class markers? In other words a selector that will select only the last of the three below:

<a class="nav">Test1</a>
<a class="disabled">Test2</a>
<a class="nav disabled">Test3</a>

Answer 1

Yes.

.nav.disabled { .... }

this has side effects in IE6, but is otherwise supported by every browser.

Answer 2

Concatenate the class selectors:

a.nav.disabled

Answer 3

CSS rule for

<a class="nav disabled">Test3</a>

is

a.nav.disabled {}

or

.nav.disabled {}