Which Event to listen for, when user navigates to an ID within the same document?

Hi,

which event should I register a listener for to get informed, when the 
user navigates inside a document via hash links like <a href="#a">A</a>?
Navigation from one document to an other I catch by listening for 
StateChange of the progress listener, but the progress listener has 
nothing to do, when navigating within the same document, so I need to 
listen to something else to get informed, when user navigated to an 
other location within the same document.

Should I register for the click event, or is there a more suitable event 
for my approach?