It turns out that this is a timely question because the long-
awaited extension from pure-static operation to fully dynamic
operation was just completed, and is included in eValid V9
Build 285 and later.
There'll be detailed documentation of this major new
capability made available with the product in the coming
weeks.
In the meantime, to answer your direct question, yes, with the
dynamic feature you can look up the location of "Submit" based
on ANY property it has -- not just the image or the text of
the button. You probably would do this with an
IndexFindElement command or, if you need to search for a
Regular Expression, an IndexFindElementEX command.
Once eValid has found the page element that has the right
"Submit" response, then eValid can send a click to that
particular element on the page. You probably do this with a
SubmitClick command or, if that doesn't work, with some
variation of the
http://www.e-valid.com/Products/Documentation.9/DOM/index.element.event.htmlIndexElementEvent command.
--The eValid Team