Highcharts official support forum

Good afternoon,
I have an Highslide licence for my site from May 2009, but now I have a problem with Highslide: while my page works fine in Firefox, it doesn't work correctly in Chrome.
I tried to find what's the matter, but I wasn't able to find anything.
This is the page that has some problems:
https://www.lineetramtorino.com/Europa.php
When I click on red dots it works correctly in both the browsers (open a picture).
When I click on name of countries in blue, it opens correctly the map of the country in both the browsers (iframe).
But when I try to click on the cities of the country it works in Firefox (open a picture) but it doesn't work in Chrome.
Can you help me?
Thank you
Antonio A.

For me, it doesn't work in Firefox or Chrome - it works only in Edge.

Just a guess, but I think the problem may be that the usemap id's are case-sensitive. So, germania and Germania do not match:
Edit: Confirmed with a quick test on one of the packaged HS example pages. The usemap and map name must match case - the id, oddly, doesn't seem to matter.

You are right! I tried what you suggested and it works.
Thank you very much for your help.
Antonio

You're welcome! It's good to know my guessing percentage is still pretty good.

BTW, this was changed only recently in Chrome - it used to be case-insensitive.