title: Is there an idiomatic way to listen for changes to the DOM using the Prototype library?
body: <p>I'm trying to add a listener to DOM change events. I was hoping something as simple as 'dom:loaded' was baked into Prototype. I'm not sure of the 'Prototype-way' to handle this.</p>
  
  <p>EDIT: I cannot control every case in which the DOM may be altered, so I can't get away with firing a custom event on every DOM change.</p>