// get document

    $this->document =& JFactory::getDocument();

 // after dispatch event called by joomla

    // this is before OnAfterRender so we can mod the document before rendering

    function OnAfterDispatch() {

        

        // get document

        $this->document =& JFactory::getDocument();

        // we only want to do the site, not admin or install

        if (!$this->mainframe->isSite()) return ;