[jQuery] Mediawiki slidetoggle() flat DOM

Hello everybody...
I searched this group, but no solution for me in the first view... ;(
So... what I need is a way to organize large mediawiki-pages with the
possibility to show/hide section-contents.
The pages are organized in an absolut flat structure something like
<h1>..</h1> sections are organized through ":header"
[

|<ul>..</ul>|<ol>..</ol>|<pre>..</pre>|<dl>..</dl>]*
<h1>..</h1> and so on...
This is what I have so far
// Some initial hiding and unhiding... All sections are hidden,
all :header(s) are visible...
// Possibility to SHOW_ALL HIDE_ALL
[..]
$( ":header" ).click(
function(){
$( this ).nextAll($(this)).not(":header").slideToggle();
return false;
}
);
So, this makes it possible to slideToggle() the current section and
the following...
What I want is, that only the current section is hidden/visible...
Does anyone know of some techniques to select the range (I know there
is something called slice(start, end)) from the first <h1> to the
following one??
Greetz
Andi