To use a form button as a navigation link to another web site, enter the following into the button's Code field:
onClick="window.location='http://www.some-domain.com';"
where 'http://www.some-domain.com is the desired web site.
To link to a page on your own site, use this code instead:
onClick="window.location='my-page.html';"
where 'my-page.html' is the desired page name.

If you want to open the link in a new window, use the window.open() statement; e.g.,
onClick="window.open('my-page.html');"