[Seaside] Form processing question..

[Rick Flower]

Hi all..

I've got a question for you all that I'm not sure how to handle in 
Seaside..

If I've got a page that comes up with a bunch of links at the top (a 
link menu of sorts to point to other object/pages) and a form for 
updating contact info for the user below that, and if the user is 
updating their contact info (using a Proxy -- WAModelProxy -- to update 
the underlying object with their data in it)... But before they finish 
and hit the submit button, they hit one of the links at the top of the 
page.. Now, in this case, I want to clear out the contents from the 
Proxy to ensure whatever crap they put into the fields is discarded and 
effectively reverts back to the committed "real" object contents. 
However, since they're not hitting the submit button, I can't use its 
callback.. I suppose I could have each possible link on the linkbar 
check to see if there was unfinished "work' and to clean it up, but 
since that unfinished "work" was in a different object, it might be 
tricky..

Are there any other means by which I can effectively gain control by the 
"outgoing" (for lack of a better term) object but before the incoming 
object gets its rendering method going?  Ideally, it would be nice if I 
could register a callback with something like :

(html leavePage) callback: [...]

to have that code called before the user leaves the page behind.. 
Perhaps some sort of means exists to do such a task or am I out in left 
field somewhere?

Thanks!

-- Rick