I just tried it again on a different computer, using FireFox, and it still works fine.
Are we talking about the same link? I'm clicking the link on the top right of the main page, right underneath the words, "Emulators For", entitled "Windows/DOS". When I do, it takes me to the page at http://www.zophar.net/windos.html
If we are in fact referring to the same link, can you click the link I just posted above, and tell me if that works for you?