title: Jquery multiselect event handler
body: <p>I have an html dropdown.  I want to fire an event whenever the selection changes in any way.  I tried registering a 'click' event but this didnt work when multi-selecting (either by dragging the mouse or holding down shift + down arrow).</p>
  
  <p>So basically, how can I fire an event on <em>any</em> selection change?</p>