OK, now you know what JavaScript looks like and how to use functions and event handlers. You're ready to start swipin' some code. Just go out, find a page that uses JavaScript to do something you want to do, and view source. Then find the JavaScript functions and statements that do what you want and copy them to your own page. Finally, look for arguments and variables you need to modify in your own HTML.
(If you're using a recent version of Netscape or Internet Explorer, error messages may be suppressed.)
Debugging JavaScript can be a somewhat time-consuming process but you now know enough to start hacking away at it. Be patient and you should be able to make most any script work on your page.
Now go forth like Oliver Twist under the benevolent stewardship of Fagin and steal, steal, steal!
Or, if this tip of the JavaScript iceberg has piqued your curiosity, I heartily recommend Thau!'s extensive (and fun) JavaScript tutorial, which will teach you how to write the kind of scripts other people will want to steal.
