Stretch horizontal ul to fit width of div

Question

For the main nav of my site, there is a 980px wide div with a ul for the main nav links. I am trying to make the nav links stretch to fit the width of the div evenly.

<div style="width: 980px;">
<ul id="horizontal-style">
  <li><a href="#">Nav Item</a></li>
  <li><a href="#">Short Item</a></li>
  <li><a href="#">Really Long Nav Item</a></li>
  <li><a href="#">Nav Link</a></li>
  <li><a href="#">Another Link</a></li>
</ul>
</div>

I am doing some typical css to make the ul list horizontally (float: left, display: block). I can tweak the padding of the li to get it very close, but what I really need is a way to make it stretch to fit automatically. Possible?

Edit Difficulty 1: Can't use tables. Difficulty 2: Each nav item will be a different width to accommodate longer and shorter link names.

Answer 1

This is the easiest way to do it: http://jsfiddle.net/thirtydot/jwJBd/

(or with table-layout: fixed for even width distribution: http://jsfiddle.net/thirtydot/jwJBd/59/)

This won't work in IE7.

#horizontal-style {
    display: table;
    width: 100%;
    /*table-layout: fixed;*/
}
#horizontal-style li {
    display: table-cell;
}
#horizontal-style a {
    display: block;
    border: 1px solid red;
    text-align: center;
    margin: 0 5px;
    background: #999;
}

_{Old answer before your edit: http://jsfiddle.net/thirtydot/DsqWr/}