Extending An Object Whose Constructor Takes Arguments?

I'm sure this question has been asked many times before, but I can't seem to get the correct terms to find the answer in Google.I understand basic JavaScript inheritance. However, everything I've read makes the inheritance work something like this:

Code JavaScript:
var ChildClass = new Function();
ChildClass.prototype = new ParentClass();
ChildClass.constructor = ChildClass;

That's fine, but what happens when ParentClass's constructor needs parameters?As an example, look at the following code:

Code JavaScript:
function Furniture(color){
this.color = color;[code)....

How could I "copy" Furniture's constructor into the Chair object? Better yet, how could I copy Furniture's constructor and then add some functionality to it?