How to pass parameters from suitelet to client script

Depending on your implementation and your preference, you could do it by adding a hidden field to the form that the suitelet is presenting and then just reading it in the client script with

currentRecord

, or you could set a session variable with

runtime.getCurrentSession().set()

on the suitelet side, and pick it up in the pageInit entry point of the client with

runtime.getCurrentSession().get()