How to make switchable galleries ?

Hello

Is there an option to do on the gallery selection page? I have galleries in January, February, March, I click and it changes to another gallery, but without creating new pages.
Now I have it so that there are several index pages: / on each different month, can it be done on one page? I have galleries in separate htm files, but I do not know how to put them on one page so that I can switch them without creating duplicate index pages.

You can put the galleries on new layers and link to the layers from the main page. Would that work?

I forgot about layers eh :) now they work perfectly, BiG THX

:)