Object that stores data key, item pairs.
A Dictionary object is the equivalent of a PERL associative array. Items can be any form of data, and are stored in the array. Each item is associated with a unique key. The key is used to retrieve an individual item and is usually an integer or a string, but can be anything except an array.
The following code illustrates how to create a Dictionary object:
var y = new ActiveXObject("Scripting.Dictionary"); y.add ("a", "test"); if (y.Exists("a")) document.write("true"); ...