JavaScript Source
Resource with free JavaScript examples for cut and paste into web pages.

JavaScript Kit
If you want to add all sorts of bells and whistles to your sites then this is a website worth bookmarking. Text effects, menus, form validation and all sorts of JavaScript goodies are available to insert into your websites. Best of all they are all FREE.

DynamicDrive.com
A renowned website for not only JavaScript but Dynamic HTML. One of the great scripts are the JavaScript menus which have made the site one of the most known javascript resources on the internet.