Question

Is there a way to remove CSS styles from an submit button so that the default browser style is applied?

Answer 1

You can set the styles to the system values,

input.overridecss {
    background-color: ButtonFace;
    color:ButtonText;
}

jsFiddle

Here is a list of values you can override, there is probably a better list but I’m lazy.

[Edit] Here is the Specification which has been deprecated lol,

so here is the correct way I guess,

input[type=button] {
  appearance:push-button; /* expected from UA defaults */
}

from Appearence