Thank you for your reply Mehdi. Seblod is a "wonder machine" in my eyes. I am on dicovering its possibilities.
What I have and want to do is as fellows:
I have a table with a list of tours. Each has 3 variants of prices. I have a form made with seblod and it shall be filled in frontend.
Depending on selected tour by the "user" in this form shall be shown the price in the text field "#price".
The form shall be usable only in frontend by logging-in. The user shall be not allowed to login in backend.
I couldn't find another solution for my "problem" than using ajax and php to get the prices from phpmyadmin table....
Best regards.
Michael