private $headCode = array();

  /*

   * Google analytics ga.js tracking code. Expanded in __construct().

   */

  private $trackingcode = '';

  private $pagetitle = ''; // Title of page

  private $scripts = array(); // Scripts to include on page

  /* the current school. See get_school(). */

  private $school;

  /**

   * \param $ntitle

   *   Must be a valid HTML string (i.e., escaped with htmlentities()).

   */

  public function __construct($ntitle, $nscripts = array(), $immediate = TRUE)

  {

    global $ga_trackers;

    require_once('school.inc');

    // Scripts and styles available to include

    $this->headCode['jQueryUI'] = '<script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.5/jquery-ui.min.js" type="text/javascript"></script><link rel="stylesheet" href="styles/jqueryui.css" type="text/css" media="screen" charset="utf-8" />';

    $this->headCode['jValidate'] = '<script type="text/javascript" src="http://ajax.microsoft.com/ajax/jquery.validate/1.7/jquery.validate.pack.js"></script>';

    $this->headCode['schedInput'] = '<script type="text/javascript" src="scripts/scheduleInput.js"></script>';

    $this->headCode['outputPrintStyle'] = '<link rel="stylesheet" href="styles/print.css" type="text/css" media="screen" charset="utf-8" />';

    $this->headCode['outputStyle'] = '<link rel="stylesheet" href="styles/output.css" type="text/css" media="screen" charset="utf-8" />'; 

    $this->headCode['gliderHeadcode'] = '<link rel="stylesheet" href="styles/glider.css" type="text/css" media="screen" charset="utf-8" />'; 

    $this->headCode['uiTabsKeyboard'] = '<script type="text/javascript" src="scripts/uiTabsKeyboard.js"></script>';

    $this->headCode['displayTables'] = '<script type="text/javascript" src="scripts/displayTables.js"></script>';

    $this->pagetitle = $ntitle;

    $this->scripts = $nscripts;

   /* compliant browsers which care, such as gecko, explicitly request xhtml: */

   if(!empty($_SERVER['HTTP_ACCEPT'])

      && strpos($_SERVER['HTTP_ACCEPT'], 'application/xhtml+xml') !== FALSE

      || !strlen($_SERVER['HTTP_ACCEPT']) /* then the browser doesn't care :-) */)

     {

       $this->xhtml = TRUE;

       header('Content-Type: application/xhtml+xml; charset=utf-8');

     }

   else

     header('Content-Type: text/html; charset=utf-8');

   if (count($ga_trackers))

     {