SQLFORM, add field with button

[KevC]

Hi community.

I want to know if you could help me. I started to use web2py, but I don't know some things. I want to create fields with a button on SQLFORM and HTML.

For example, I have author table and book table, but a book can get several authors and I need to create differents "INPUT" on the FORM for save them with book and his fields.

I have a relation many to many between book and author. Also I combine both FORM´s (author and book).

I wanna this FORM

Title:       |______________

Author:    |______________ + -       (Where '+' I wanna use it to add more authors in the same FORM and '-' to remove fields if I mistake.

Languaje:|______________

ISBN:     |______________

Etc.

Greetings.

[黄祥]

i think you can use list:reference field type for author field in table book.

ref:

http://web2py.com/books/default/chapter/29/06/the-database-abstraction-layer#list--type--and-contains

best regards,

stifan