[Zope] open image in a fitted new window

[Alan]

Dears,

I was wondering how to once clicking on a image (thumbnail) I would
get the full-size image in a fitted new window, without buttons,
address field etc. I can realise how to do it with javascript but I
don't know, if it's the only way, how to integrate javascript in a
zpt. A example/tutorial would be very welcome so.

If it can be done without javascript, just with zope tools, that would
be very appreciated.

Many thanks in advance.
Cheers,
Alan