Change Update Cart Button to an image

[MissHTML]

I'm trying to change my update cart button in the view cart page of our store to an image button. Does anyone have the code to where it will still update the cart and I can have my own image, and would be willing to share?

The site is Trailer Parts - Boat Trailer Parts, Trailer Wheels, Trailer Tires, and Custom Boat Trailers thanks in advance for any advise.

[thecartdesigner]

This should do it

<input type="image" name="Add" id="Submit2" src="yourimage.png" border="0" alt="Update">