Is there any real difference to screen reader users (or any users really) whether i use “image” rather than “submit” as the type attribute for my form submission button?
eg:
<input type="submit" value="Submit!" />
vs
<input type="image" src="myButtonImage.jpg" value="Submit!" alt="Submit!" />
Nope, they’re essentially the same.
See: Using ‘button’ and images for submit. Just make sure to always give the image submit alt text.