I've:

function Obj1(param)

{

    this.test1 = param || 1;



}



function Obj2(param, par)

{

    this.test2 = param;



}

now when I do:

Obj2.prototype = new Obj1(44);

var obj = new Obj2(55);



alert(obj.constructor) 

I have:

function Obj1(param) {

    this.test1 = param || 1;

}

but the constructor function has been Obj2... why that?
Obj1 has become the Obj2 prototype...

Can someone explain me, in detail, the prototype chain and the constructor property

Thanks