Prototype Tips and Tutorials
The documentation for the latest stable version of Prototype will always be located at http://api.prototypejs.org.
This area contains narrative documentation you can use to discover Prototype.
Defining classes and inheritance
Learn how to define classes and subclasses in Prototype and how to make supercalls.
How Prototype extends the DOM
Learn how Prototype adds custom methods to DOM element nodes — and how you can define your own custom methods.
Introduction to Ajax
Learn how Prototype simplifies the most common kinds of Ajax requests.
Introduction to JSON
Learn about Prototype's support for JSON encoding and decoding.
Learn about Prototype's support for event delegation: an advanced technique for event-driven programming.
Measuring elements' dimensions and offsets
Learn how Prototype makes it easy to get pixel measurements of elements.