How to insert a URL with parameters into a RHPAM task form

[Martin Gaido]

Hi, I need some ideas to be able to insert, in a task form (RHPAM) a url that must have as a parameter a data (an id) that I have available in a process variable (something like www.yoursite.com?ID=12345)
I am trying to use the html control provided by the form manager, but it is impossible to manipulate it, and from what I see it is not possible to insert code in javascript either.
Thank you very much in advance.