Prototype creation

[apendua]

I think it is a batter way to do it ;)

No instance of tha parent parent should be created here, since it is a premature stage. Imagine a generic manager class (this is exactlly the problem I had experienced), which specializes to some different kind of managers. To me, calling a manager constructor with no data attached did not make any sense, so using an instance of base class as a prototype of the child was not possilbe. Instead, one should use the prototype of the base class - that's what is it for.

[apendua]

If you're afraid to use Object.create (it's not supported in older versions of IE), you can always try this:

var f = function(){};
f.prototype = parent.prototype;
child.prototype = new f;

or even this ;)

child.prototype = { __proto__: parent.prototype };

These are all equivalents of

child.prototype = Object.create(parent.prototype);