HELP: addClass, removeClass

HELP: addClass, removeClass

Dear,

I have write jQuery script as below and added class "minus" when I click on h1, how do I click again h1 to remove class "minus"?
  1. <script>
  2. $(document).ready(function() {
  3.     $(".features h1").click(function() {
  4.         $(".features ul").slideToggle("fast");
  5.         $(".features h1").addClass("minus");
  6.     });
  7. });
  8. </script>
  9. <div class="features">
  10.       <h1 class="plus">Feature</h1>
  11.       <ul style="display: none;">
  12.             <li>hello world</li>
  13.       </ul>
  14. </div>

Thanks~~~