<?php class Ticket278 extends TPage { function validator2_onValidate($sender, $param) { $sender->Enabled = $this->check1->Checked; } function validate2_onPostValidate($sender, $param) { $sender->Enabled = true; } function onPreRender($param) { parent::onPreRender($param); $this->panel1->Style = $this->check1->Checked ? "display:block" : "display:none"; } } ?>