How to make a navbar tab appear a different colour from the others when selected

[billstelling]

I have it done for the header links in the html for them in the header. This is page specific but it will give you and Idea what to look for in the nav code to add the css for it.

<ul class="nav right">

    <li class="">
        <a href="/"> … </a>
    </li>
    <li class="">
        <a href="http://www.trafficunit.com/howitworks.htm"> … </a>
    </li>
    <li class="">
        <a href="http://www.trafficunit.com/about.htm"> … </a>
    </li>
    <li class="selected">
        <a href="http://www.trafficunit.com/support/forum.php"> … </a>
    </li>
    <li class="">
        <a href="http://www.trafficunit.com/faqs.htm"> … </a>
    </li>
    <li class="">
        <a href="http://www.trafficunit.com/contact.htm"> … </a>
    </li>

</ul>

I am more of css stylist than an html coder although I do know it fairly well. I might mess with it tomorrow and see what I can figure out. Been meaning to anyhow due to the replaced header and footer so the site matches the main web site. That site is the test beb for the rework on distribber going on right now. I plan on putting all my work on it later on whenI get some free time.

--------------- Added [DATE]1387271877[/DATE] at [TIME]1387271877[/TIME] ---------------

this is it for vb.org..

a.tab2:active, a.tab2:visited {
    background: url("images/cstyle/button2.gif") no-repeat scroll right bottom transparent;
}

so it would be something like this..

a.tab:nth-child(6) a.tab2:active,a.tab:nth-child(6) a.tab2:visited {
    background: url("images/cstyle/button2.gif") no-repeat scroll right bottom transparent;
}

only using color instead of a graphic.

a.tab:nth-child(6) a.tab2:active,a.tab:nth-child(6) a.tab2:visited {
    background-color: #ffffff;
}