public function setItemsPerPage( $items_per_page )
	{
		if ( !is_int( $items_per_page ) )
		{
			trigger_error( 'Pagination setItemsPerPage: Items per page must be an integer.' );
			return false;
		}

		if ( $items_per_page <= 0 )
		{
			trigger_error( 'Pagination setItemsPerPage: Items per page must be a positive integer.' );
			return false;
		}

		$this->items_per_page = $items_per_page;
	}