View file stat/_ajax/cols.php

<?php
require_once ( $_SERVER['DOCUMENT_ROOT']."/_core/system.php" );
switch ($act) {
	default:
		if(isset($_SESSION['kateg'])):
			unset($_SESSION['kateg']);
		else:
			$_SESSION['kateg'] = 1;
		endif;
		$d = ['type' => 'success'];
		echo json_encode($d); exit;
	break;
	case 'newsite':
		if(isset($_SESSION['newsite'])):
			unset($_SESSION['newsite']);
		else:
			$_SESSION['newsite'] = 1;
		endif;
		$d = ['type' => 'success'];
		echo json_encode($d); exit;
	break;
}