Login popup dont work

Hi,
suddenly the pop-up login form does not work.
I checked that "gkLogin" Additional class was added but continues to open up the standard login page of joomla.
Can you help me to understand where is the error?
my website: http://hotelsaviola.it/
Sorry for my English at school level !!
Fabio

I discovered that the problem is only the home page.
In addition I also blocks the opening of the floating menu

Solved myself.

Hi

Problem sounds like some javascript conflict. Can You please share the solution in case some other users will be looking for an answer to the same question ?