title: Wicket key event -> get key!
body: <p>one more question:
  I created an inputfield and added an AjaxFormComponentUpdatingBehavior ("onkeyup"). Now I want to execute some code only if the right key (space-key) is pressed.
  How am I able to get the last pressed key? I thought it would be stored in the target attribute but I couldn't find it there... Is there any easy way to solve this problem?</p>
  
  <p>Thx guys!
  CU Sylvus</p>