function get_item_display_manage($column, $item)
 {
     $id = $this->page->required_param('id', PARAM_INT);
     $target = $this->page->get_new_page(array('action' => 'edit', 'association_id' => $item->id, 'id' => $id));
     if ($target->can_do()) {
         $editbutton = "<a href=\"{$target->get_url()}\"><img src=\"pix/edit.gif\" alt=\"Edit\" title=\"Edit\" /></a>";
     } else {
         $editbutton = '';
     }
     return $editbutton . ' ' . parent::get_item_display_manage($column, $item);
 }
 function __construct(&$items, $columns, $page, $decorators = array())
 {
     $id = required_param('id', PARAM_INT);
     $users = usertrack::get_users($id);
     $this->numusers = empty($users) ? 0 : count($users);
     parent::__construct($items, $columns, $page, $decorators);
 }