Making a pop up

[eluser]fedefrias[/eluser]
Hi first of all, as im newbie, want to know if to make a pop up i must use MVC. What iñve done: i made a link from an image to my controller and from there i call the view, that have a javascript rutine to make the pop up.
That rutine locally runs well. Wen i upload it it doesnt works...
here is the url if anyone wants to see it.

http://pruebasia.com.ar/deomnibus/unidades/ayuda

Thanks for your help
F.