The internet is no longer dominated by Internet Explorer users. Even Firefox is being overtaken as 2nd browser of choice. Personally, I like Safari (most commonly used by Apple Mac users), but I also have Opera, Chrome and Firefox installed on my PC.

Unfortunately, when I click on a campsite on the 'map', I get "Safari can’t run the script “//pushin hover” because Safari doesn’t allow JavaScript to be used in this way." thus I am unable to get the campsite details.
This only seems to affect Safari users, but as this includes most Apple Mac users, it's a large enough portion of the demographic that it would require fixing.
The whole site should probably be thoroughly checked for compatibility with the top 5 browsers mentioned above. I have all 5 installed for checking my own websites...