/**
  * Sets the active menu item. 
  * This should be done before the headerMenu.tpl template calls the function getMenu().
  * 
  * This function should be used in each script which uses a template that includes the headerMenu.tpl.
  * 
  * @param	string		$menuItem	name of the active menu item
  */
 public static function setActiveMenuItem($menuItem)
 {
     self::$activeMenuItem = $menuItem;
 }