public function OnInit($param) { parent::OnInit($param); $ClientScript = $this->Page->ClientScript; //CSS stylesheet $this->_CssClass = $this->getID(); $registerID = 'JzlTreeControl' . $this->CssClass ? '-' . $this->CssClass : ''; if (!$ClientScript->isStyleSheetRegistered($registerID) && !$this->getCssClass()) { $ClientScript->registerStyleSheet($registerID . $this->getID(), sprintf(self::STYLE_SHEET, $this->_CssClass, $this->_ImagesPath)); } $mainRegisterID = 'JzlTreeControl.Global'; //Javascript if (!$ClientScript->isBeginScriptRegistered($mainRegisterID)) { $ClientScript->registerBeginScript($mainRegisterID, sprintf(self::JAVA_SCRIPT, $this->_CssClass)); } }