jQuery Thickbox: Call from iFrame?

Hello, I’m trying to figure out something. At the moment, I have a webpage with an iFrame embedded. Inside the iFrame, I’m trying to call thickbox and open it in the parent frame. The problem right now is of course that the thickbox just opens inside the iFrame and not over the entire page like I want to. I really don’t have any javascripting experience and really am only limited to copy and pasting javascripts and hope they don’t brea but I would really appreciate it if someone could help me with this. Thanks in advance.