[fw-mvc] Zend_form button scr image

begin:vcard
fn:Lionel Morrison
n:Morrison;Lionel
email;internet:lionel@morrison101.com
tel;cell:386-336-7709
x-mozilla-html:FALSE
version:2.1
end:vcard

How the heck do you go about setting the src="" attribute of a button
using Zend_form.

I've tried using a decorator which adds the src="image/loginsubmit.gif"
to my input tag but no image shows. I've also tried using CSS to style
the button without success.

Thanks.

Lionel