Changing Form Fields

[xkyogre]

I am making various forms fo a web site I am making.
I want it to have a professional look so I came across the idea of not having standard submit buttons.
How can I use a picture instead of a submit button? Is it even possible?

[bolty2uk]

<input name="submit" type="image" src="submit.jpg" height="20" width="80" border="0" alt="Submit" />