Testing my back button on Macs

Hi guys… just curious if anyone out there with a Mac… and possibly using multiple browsers would do me the favor of checking this website…
www.hallmarkglen.org to see if the back button works on a Mac. If so… or if not… could you tell me what you used? It works with a PC… but should work with a Mac too… now that I’m using Iframes… Anyway, thanks in advance