How to construct a Rectangle element

I would like to use the Rectangle object described in the help to ExtendScript CS5:

>  Rectangle
>  Adobe Illustrator CS5 Type Library
>  Describes a rectangle. This class is also a four-element collection.

It has nine properties and methods.

This is not the same as PathItems.rectangle().

How can I construct a var of type Rectangle?

                var rect = new Rectangle

results in the error, "Rectangle does not have a constructor"

How can I create a var of type Rectangle and then set the values?  I would like to store it in an Array.