Element#measure(property) gives:

By using the Element#on object in Prototype event API, what benefit is being gained?

When using data from an untrusted source, it should be sanitized. What does this entail?

If your data is not an instance of an object and you invoke the toJSON method, where should the syntax: toJSON() be located in the string?

What is the alternative of Element.extend() function in Prototype?

You have a class that inherits from a parent class. How do you call a parent version of a class method from within a child class method of the same name?

Utilities $A and $R create an array and ObjectRange object. What will be their results given the following string; $A($R('a', 'e')) ?

How would you create a new div element and insert it as the last child of the body?

Why would it be beneficial to use an array in Prototype?

What is the subclass of Ajax.Request, if any?

Despite DOM elements having Prototype extensions built-in, will they function in Internet Explorer?