onload div/modal window with "please wait"
<p>I have a big form, with many list boxes that are feeded by an jQuery plugin, jCombo.</p>

<pre><code>$("select#arhpcnDetinator").jCombo("services/detinatori.php", { 
       initial_text: "Selecteaza valoarea",
       selected_value: $("input#arhpcndetinatorID").val()
});
</code></pre>

<p>The problem: because are many objects in form, feeded by jQuery&amp;jSON, have some latency on loading. DOM is loading instantly, but listbox are populated much slowly (3-4sec).  So I need show an autoclosing loading div ("Please wait...). I tryed many variants  but are loaded after listboxes are populated. Also I find a simple solution using prototype, but are incompatible with jQuery :(.
If someone can figure a solution, I'll appreciate that. 
Thank you in advance. </p>
