[jQuery] getScript does not bind plugin to $. alias

[jQuery] getScript does not bind plugin to $. alias


I am trying to load plugins dynamically based on certain url params.
The part that appears to work:
$.getScript('/js/jquery/plugins/myniftything.js');
The problem is, trying to access $.MyNiftyThing_MyFunction(); claims
to be undefined.
Is there a way to force the $ to bind with the newfound plugin?
What about unloading the plugin when complete?