Выход из админки при отсутствии активности

<?php
switch ($modx->event->name) {
	case 'OnManagerPageBeforeRender':
		$script = "<script>\n\t";
		$script .= "function setLogoutTimer(){if (logoutTimer) clearTimeout(logoutTimer); return setTimeout(function(){location.href='?a=security/logout';}, ".$modx->getOption('admin_logout_time', null, 20)."*60000);};"."\n\t";
		$script .= "var logoutTimer = setLogoutTimer();\n\t";
		$script .= 'document.addEventListener( "click" , function() {logoutTimer = setLogoutTimer();}, true);'."\n\t";
		$script .= 'document.addEventListener( "mousemove" , function() {logoutTimer = setLogoutTimer();}, true);'."\n\t";
		$script .= 'document.addEventListener( "contextmenu" , function() {logoutTimer = setLogoutTimer();}, true);'."\n\t";
		$script .= 'document.addEventListener( "wheel" , function() {logoutTimer = setLogoutTimer();}, true);'."\n\t";
		$script .= 'document.addEventListener( "keydown" , function() {logoutTimer = setLogoutTimer();}, true);'."\n";
		$script .= "</script>";
		$modx->controller->addHtml($script);
	break;
}