Allow more complex behaviour for AutoCompleter component

It would be nice to be able to modify the default behaviour of the ajax autocompleter component upon selection of an list item. this would make it a even more useful component and exceed it's capabilities beyond simple text replacement.

current behaviour:

1. 1. 1. snip : wicket-autocomplete.js line 93-97 ###
         case KEY_ENTER:
         if(selected>-1){
         obj.value=getSelectedValue();
         hideAutoComplete();
         hidingAutocomplete=1;
      2. eof snip ###

Instead of having obj.value= being filled by the current text value it would be nice to have the option of specifying a js function callback to e.g. post back the selected value to the server. This way you could implement more complex behaviour, for example select a company address from a list and, on selecting it, send back the address id to the server which then would fill out street, house number, zip code and city.

pseudo code:
if selected
if callback
callback(value)
else
obj.value = current value
end
.....

probably the right place for such a on-select contribution would be the autocomplete renderer.