title: ckeditor add event handler to dialog element
body: <p>I'm writing a custom dialog/plugin for <code>ckeditor</code>. What I want to know is how I can add an <code>eventlistener</code> to a select box in the dialog, to alert when the selected value has been changed. How can I do this? </p>
  
  <p>I've looked at the API and I've come across some useful information but it is not detailed enough. I can't make a connection between the API information and what I am trying to implement.</p>