"create document" form: add a link if the document already exist

Hello,

I propose you to add 2 link if a user is adding a new document and is typing a name of an exist document.

By exemple: Sandbox.FirstDoc already exist
If users want Add new document and is filling "FirstDoc" in "Page Name" textbox, I propose you to obtain this:

(Perhaps only one link is enough: view or edit link?)

Pascal B