This website has a number of "private areas", each protected by a password.
Type the password for the private area you wish to visit, then click "Go" (or press "Enter"):
NOTE. There is no need to remember the password after its first use.
Having reached the "private area" you require, you are welcome to
"bookmark" it (add it to your list of favourites) and you can then
visit it again as often as you like, without the password.