How can I get a popup window to follow the cursor?

Hello all,

I should preface this question by stating that I am very new to the world of Unity and JavaScript.

So far, I have a scene where I can click on various objects and each pulls up its own popup window displaying information. The issue is that I have so far had to hard-code the position of each popup window. I would like to use the mouse's position to determine the window position. I've tried using mousePosition.x and mousePosition.y in the GUIWindow's position parameters but the positions stay at 0.

Any help would be greatly appreciated.

Thanks, Shiva