Spin.js - Spinner inside a button

HTML

<script src="http://fgnass.github.com/spin.js/spin.js"></script>
<button id="submit">Submit</button>

CSS

button {
    position: relative;
    padding: 10px 20px 10px 34px;
}

JavaScript

var opts = {
  lines: 11,
  length: 3,
  width: 2,
  radius:4,
  left: '20px'
};
var button = $('button');
var spinner = new Spinner(opts).spin(button);