@raamay
There are of course client-side methods you could use to get this info. (Java, ActiveX, etc..).
But why do you need the full path?
You can't actually use it, as no decent browser will ever give you access to the local HDDs, nor allow you to set the value of a file input box.
Wouldn't it be enough to just store the file that was previously sent and let the user know that it has already been received? The file name alone would do fine for that purpose.