Count Widgets WordPress
===

Is there a way to count widgets in widgetized area in WordPress.

I need to add specific class for every 3rd widget.

For example:

    <div class="widget-item">...</div>
    <div class="widget-item">...</div>
    <div class="widget-item foo">...</div>

    <div class="widget-item">...</div>
    <div class="widget-item">...</div>
    <div class="widget-item foo">...</div>

and so on...

Thanks!
