How to Make Submit Button Look Pretty Without Using Graphics?

Hi all,
The Submit button in my form looks too dull. How can I make it look pretty without using graphics? I try to conserve bandwidth.
Many thanks.

You can use standard CSS styles to change it a bit but you can't do much more than give it a background colour, border, or change the font to make it look too different.

<input type="button" class="btn" />

.btn {
background: #FFF;
border: 1px solid #CCC;
}