+ $this->showForm();
+ }
+
+ /**
+ * Wrapper for showing a page
+ *
+ * Stores an error and shows the page
+ *
+ * @param string $error Error, if any
+ *
+ * @return void
+ */
+
+ function showForm($error=null)
+ {
+ $this->error = $error;
+ $this->showPage();
+ }
+
+ /**
+ * Show the page content
+ *
+ * Either shows the registration form or, if registration was successful,
+ * instructions for using the site.
+ *
+ * @return void
+ */