[jQuery] selecting parent div from an id

[jQuery] selecting parent div from an id

Hi,
I'm afraid it still won't work, and I'm unable to figure what I'm doing
wrong. It there some kind of debugging function in jquery so I know what
I'm doing wrong? I'm receiving no error messages in firefox :(..
In this example I'm receiving a submit from input field:
parttime_perc_oud
Which has an parent div with an id of: div-oude-inkomenssituatie-details
Thanks for the reply's so far..
My complete html code:
--------------------------------------------------
<html>
<head>
<META http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<title>Inkomenswijzer (Inkomenswijzer alleen reintegratiescenario
11-07-2006)</title>
<style type="text/css" media="screen">@import "css/default.css";</style>
<style type="text/css" media="screen">@import
"css/tabs.css";</style><script type="text/javascript"
src="js/jquery.js"></script><script type="text/javascript"
src="js/default.js"></script></head>
<body id="persoonsgegevens">
<div id="module">
<div id="header">
<ul>
<li id="nav-persoonsgegevens"><a
href="index.ioxp"><span>Persoonsgegevens</span></a></li>
<li id="nav-inkomenscomponenten"><a
href="inkomenscomponenten.ioxp"><span>Inkomenscomponenten</span></a></li