classes of an object

[apathy <apathy@odyssee.net>]

if i declare a class of a navigator object, can i pass it to another 
function?

eg: i declare foo as a new class of the date object by means of "var foo 
= new Date". if i pass foo to another function, can i use foo's methods 
such as getDate and such in that other function?

and if the terminology is wrong here, i'd appreciate if someone would 
point this out.

thnx.
ju
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