Tell us what you are trying to do?
I'm trying to do something similar to hidden link
In this form the "Select Campus" and "Select Course" boxes have no options until you select a School. Then they are populated with the relevant Campuses / Courses.
I have 3 post types, Schools, Courses and Reviews.
There are relationships between them as follows:
Schools >> Courses (one-to-many)
Schools >> Reviews (one-to-many)
Courses >> Reviews (one-to-many)
Users can write a review, and when that review post is created the form creates a relationship to both the school and the course.
I have a generic page where they can write these reviews with a post form. The first 2 fields in the form are selects for the School and the course.
As it stands these fields are populated with all the schools and all the courses on the site.
Ideally I'd like it to work so that when they select a school the options on the course select are then limited to only courses in a a relationship with the selected school.
I'm not sure if I can do this with Forms, whether I can do it with a bit of javascript, or whether I can somehow fake it using a view outside my form.
Any guidance much appreciated.