jQuery Form Plugin: action="xxx" restrictions?

jQuery Form Plugin: action="xxx" restrictions?


I started with the "html" example at Mike Alsup's page:
http://malsup.com/jquery/form/#sample6
That worked fine.
I then changed the form action attribute from "html-echo.php" to my
own
site's function library:
"index.php?fnc=ajaxComments"
then ajaxForm breaks on me, even though the ajaxComments function is
identical to Mike Alsup's html-echo.php.
This only difference is that his code was directly in a .php file,
whereas mine is in a function.
I've had no problems using my site's function library with $.ajax,
only ajaxForm..
The page goes to white/blank, and the
browser (IE) says in the corner:
"downloading data javascript:""..."
Any thoughts?
thanks
Jason