Event.observe(window, 'load', loadMenu, false);
function loadMenu() {
  var mainMenu = new accordion('sideMenu01', {
    // The speed of the accordion
    resizeSpeed : 10,
    // The classnames to look for
    classNames : {
      // The standard class for the title bar
        toggle : 'accordion_toggle',
        // The class used for the active state of the title bar
        toggleActive : 'accordion_toggle_active',
        // The class used to find the content
        content : 'accordion_content'
    },
    // The direction of the accordion
    direction : 'vertical',
    // Should the accordion activate on click or say on mouseover? (apple.com)
    onEvent : 'click'
  });
}