Advanced styling with jquery?

Hi,
I'd like to do some advanced styling. If you have a look at http://uniformjs.com/, this is one solution for what I'd like to do. But - it seems uniform.js needs the class to be added to the input item itself, like this:

<li id="field_1_3" class="gfield gfield_contains_required">
<label class="gfield_label" for="input_1_3">
Tele­fon­num­mer
<span class="gfield_required">*</span>
</label>
<div class="ginput_container">
<input id="input_1_3" class="medium uniform" type="text" tabindex="5" value="" name="input_3">
</div>
</li>

But if I use the css class option in the advanced tab, what I get is this - the class name is added to the list item, like this:

<li id="field_1_3" class="gfield gfield_contains_required">
<label class="gfield_label" for="input_1_3">
Tele­fon­num­mer
<span class="gfield_required">*</span>
</label>
<div class="ginput_container">
<input id="input_1_3" class="medium" type="text" tabindex="5" value="" name="input_3">
</div>
</li>

Any tips on how to solve this? I can probably use just about any of the many form-styling-jquery-solutions out there if that would solve it.