Okay, that could work, but in my case I'm not wrapping each led-sign element in a form. What I've come up with, after looking at the Link class, is registering a new IRequestListener, my PromptResultListener.Then, when rendering i get the url for the listener and append a parameter, like this:
Probably the simplest way to go is to create a panel with a hidden
field, or a textfield with style='display:none', and a label. the rest
is left your javascript guru-ness.
wicket:panel
span wicket:id=text
onclick=document.getElementById('foo').value=prompt('foo',
'bar');text comes here/span
