How to change value of a form text field using javascript or rjs

Rails
1

I want to change the value of a text_field under a fields_for when user
hit a button.
Does anyone know how to do it in javascript or rjs code. Thanks so
much!!

2

never mind. I got it…

Jing Tian wrote in post #965711:

I want to change the value of a text_field under a fields_for when user
hit a button.
Does anyone know how to do it in javascript or rjs code. Thanks so
much!!