JQuery :: Hide Part Of What Loaded With .load()?

I'm working on an embedded device and I want to display only part of the original configuration page by building a jQuery page on top of it. Unfortunately, the code that generated the pages was not ajax friendly in the sense that the only way I have to identify the parts I want to show or hide is the class attribute. Up to now, I've been able to load the page with the simple code:

<div class='contentcontainer'>
<hr> <div id="content">
</div>
</div> <script type='text/javascript'>

[Code].....

But it doesn't work. Then I read on the [URL] that I would need to wrap it:

Chris Moore
9 months ago

If you want to load some content into a div and then manipulate it afterwards ((ie: loading something your use a template for a message window and then want to change the message contents) you *must* do it by wrapping it in the completed function handler..

Don't just throw it a few lines down, you'll get random chances that the selector will

how I should do this? Do I need to replace the test() function by a function that will do the post treatment? How then?