Subj : Undefined Data State?
To   : netscape.public.mozilla.jseng
From : Brian Genisio <BrianGenisio@yahoo.com>
Date : Fri Jan 23 2004 09:38 am

Hello all,

Lets say in the browser, you use an object that is undefined, such as :

alert(window.opener); // assuming window.opener is undefined

In this case, the browser will print "undefined".

My question:

Can the JSObject have a value of undefined?  Or does the object's 
private data need to keep that state... for instance, is the alert 
method checking a valid private object?  Or is it checking the JSObject 
to see if it undefined?

In other words, does the JS engine maintain undefined state?  Or does 
the programmer maintain undefined state with a valid object?

Thanks,
Brian

.