title: input[type="submit"] - change background when clicked
body: <p>I have a simple <code>&lt;input type="submit" value="Search"&gt;</code> submit button.
  In the CSS i have styled it with <code>input[type="submit"]</code> and <code>input[type="submit"]:hover</code> so it changes its background by default and when hovered. Is there a way to change its background when clicked?</p>