Question

Show me another way to write so it finds the first A:

$("UL.tab LI A.selected, UL.tab LI A:first-child").corner("tl:7px bl:7px");

As my Jquery doesnt seem to go for the first A tag!?

Markup:

<ul class="tabNavigation">
            <li><a href="#Description" class="selected">Description</a></li>
            <li><a href="#Details">Details</a></li>
            <li><a href="#Features">Features</a></li>
            <li><a href="#SpareParts">Spare Parts</a></li>
            <li><a href="#Downloads">Downloads</a></li>
          </ul>

Answer 1

For your markup you can use the following selector:

$("ul.tabNavigation li:first a").corner("tl:7px bl:7px");

Here is better to use :first selector for <li>, since <a> is always the :first-child of <li>.