Using FontSelector to change font family

I am using jQuery font selector plugin posted here

http://www.fullfatcode.com/2011/04/10/jquery-font-selector-version-2/

It's all good, except, I want to do something when the actual开发者_高级运维 font is selected. At the moment the plugin is called via

$('input.font').fontSelector();

I guess what I'd like to be able to do is, capture the event when the font is selected and then do something. Maybe

$('input.font').fontSelector(function(){
  alert('hi');
});

Here's what I have been playing with

http://jsfiddle.net/d7nQV/1/

I tried

$('input.font').keyup(function(){
  alert('hi');
});

But it doesn't like it.

A little modified version: http://jsfiddle.net/cbkvs/