What a dreadful page - no doctype for a start, so it is designed in quirks mode! then it refers to IE5 and Netscape 4.5, and Flash 5 !!!
That page is an antique from a previous century - actually it says 2001, which makes it even worse, as css had been around for about five years by then, yet it uses tables for layout and in-line styles.
lol thats not the browser's fault. As mentioned, you should fix the coding errors, including adding a valid and complete doctype! Clean code and a valid doctype is the BEST way to ensure ALL browsers render properly. You can view the errors here.