Inheritance in javascript, variables in the “parent”

Question

I am doing OO javascript for the first time. I have read about inheritance and prototype and thought I had cracked it. Until I discovered this little example.

Answer 1

I think

TestObject2.prototype = new TestObject();

is overriding the constructor of TestObject2.

Try

function TestObject2(data)
{
    TestObject.call( this, data);
    this.__construct(data);
    this.dothings = function()
    {
        this.dosomestuff();
    }
}


TestObject2.prototype = new TestObject();
TestObject2.prototype.constructor = TestObject2;