The basic requirements are:
IE 5.5:

[Tools][Internet Options...][Security][Internet] [Custom Level][Cookies][Allow cookies that are stored on your computer][Enable]

[Tools][Internet Options...][Security][Internet] [Custom Level][Scripting][Active scripting] [Enable]

[Tools][Internet Options...][General][Settings...] [Every visit to the page]

[Tools][Internet Options...][Security][Internet] [Custom Level][Miscellaneous] [Submit nonencrypted form Data][Enable]



IE 6.0:
[Tools][Internet Options...][Privacy]

[Tools][Internet Options...][Security][Internet] [Custom Level][Scripting][Active scripting] [Enable]

[Tools][Internet Options...][General][Settings...] [Every visit to the page]

[Tools][Internet Options...][Security][Internet] [Custom Level][Miscellaneous] [Submit nonencrypted form Data][Enable]



Netscape 4.76:

[Edit][Preferences][Advanced][Cookies] [Accept only cookies that get send back to the originating server] or [Accept all cookies]

[Edit][Preferences][Advanced] [Enable JavaScript]

[Edit][Preferences][Advanced][Cache] [Every time]



Netscape 6.2:

[Edit][Preferences][Privacy & Security][Cookies] [Enable cookies for the originating web site only] or [Enable all cookies]

[Edit][Preferences][Advanced] [Enable JavaScript for Navigator]

[Edit][Preferences][Advanced][Cache] [Every time I view the page]