public Book[] searchBooks(String word) {
		Vector result = new Vector();
		Iterator i = books.values().iterator();
		while (i.hasNext()) {
			Book book = (Book)i.next();
			if (book.getBookId().indexOf(word) != -1
			 || book.getTitle().indexOf(word) != -1
			 || book.getAuthor().indexOf(word) != -1
			 || book.getTranslator().indexOf(word) != -1
			 || book.getPublisher().indexOf(word) != -1
			 || book.getKeyword().indexOf(word) != -1
			 || book.getMemo().indexOf(word) != -1) {
				result.add(book);
			}
		}
		Book resultArray[] = new Book[result.size()];
		result.toArray(resultArray);
		return resultArray;
	}