All this does is take a force 9 ftp address (eg http://www.fossweb.f9.co.uk), replaces the www. with fp. to get the FrontPage address (eg http://fp.fossweb.f9.co.uk) then opens the latter address. It also writes a hyperlink on the page in case the redirect script should fail for some reason.
The JavaScript file contains two functions:
LinkTo
Homepage
The first one redirects the page immediately, the second writes the hyperlink on the current page.