There are a number of resources on the Internet where you can learn JavaScript. Many of the sites deal with JavaScript as it relates to web browsers. Learning JavaScript as it relates to Servoy requires the fundamentals. Here are a few good sites.
Learning Resources
http://www.devguru.com/Technologies/ecmascript/quickref/javascript_intro.html
http://developer.netscape.com/docs/manuals/index.html
http://devedge.netscape.com/library/manuals/2000/javascript/1.5/guide/
http://javascript.internet.com/
http://www.javascriptguide.com/
Code Fragment Resources
http://www.hotscripts.com
more to come...