Allow theme styling for form buttons

[keith]

system_contactForm_v1_1

I would like to style the contact form button as part of my theme. But the styling for this button needs to be separate from the input boxes. I did this in my version of the file system_contactForm.php by adding the part in bold.

<input id="submit" type="submit" name="submit" value="Submit" />

This lets me use the CSS selector:

input#submit

Thanks.