public static function addTableStyle($styleName, $styleTable, $styleFirstRow = null, $styleLastRow = null) {
		if(!array_key_exists($styleName, self::$_styleElements)) {
			$style = new PHPWord_Style_TableFull($styleTable, $styleFirstRow, $styleLastRow);
			
			self::$_styleElements[$styleName] = $style;
		}
	}