[jQuery] How to find active hyperlinks?

[Dennis Madsen]

I've this CSS to style my links in my menu:
.menu a:link, .menu a:active, .menu a:visited{
    color: #ffffff;
    text-decoration: none;
}

I would like to find the a-tag (<a>) which is active. I've tried
something like: $('.menu a:active').

How can I find that element?