Manipulating HTML of widget control panel on widgets.php in WordPress 2.8

For one of my plugin projects, I’m using jQuery to manipulate the HTML in the settings panel of a widget. The specific use is showing more options if the user toggles a dropdown (I’m trying to simplify things by not showing it on page-load). Unfortunately, since WordPress 2.8, the Javascript I was using to do this no longer works.

I’ve done a bit of testing and the function grabs the setting of the dropdown menu just fine but doesn’t want to do the HTML manipulation (hiding one div and showing another) at all. This does work in “accessibility mode”, however. Any idea as to what might be causing the conflict?

Thanks in advance!