function parse_containers($containers)
	{
		// Construct an array of container names
		if (!is_array($containers)) {
			$containers = explode(',', $containers);
		}
		// Parse each container
		foreach ($containers as $container) {
			$masktree = $this->read_container($container, _ETS_ROOT);
			if ($masktree === FALSE) {
				$this->error(11, 52, $this->container);
			} else {
				$this->masktree = $this->masktree_merge($this->masktree, $masktree, $container);
			}
		}
	}