What do I need?

[blue27]

http://bostonchefs.com/

What script do I need to create a site similar to this one.
Do I even need a script or can I do it with forms?

[newtsys]

Blue.... looks to me, after viewing the source code, that is is just javascript driven drop down forms :)

I am sure you could accomplish this in your favorite HTML editor or find a javascipt menu program somewhere that will simplify this something like http://javascript.internet.com/generators/drop-down-menu.html

[AffordableHOST]

Ugh! Don't use JS. You'll make the page completely unusable for up to 20% of your site visitors. Use a server side solution instead.

[Rincewind]

Doesn't need any scripting. Just use normal jump menu style forms. You can use javascript to make the form go as soon as the selection is made but you can get round that by just adding a "go" button beside each menu.