function Cat(name)
{
    this.name = name;
}

Cat.prototype.voice = function ()
{
    console.log("Hello, my name is: " + this.name);
}

var cat1 = new Cat("Murzik");
cat1.voice();

function HomeCat(name, address)
{
    Cat.call(this, name);
    this.address = address;
}


HomeCat.prototype = Object.create(Cat.prototype);
HomeCat.prototype.constructor = HomeCat;

HomeCat.prototype.voice = function ()
{
    Cat.prototype.voice.call(this);
    console.log("I'm from: " + this.address);
}

var cat2 = new HomeCat("Murka", "Kiev");
cat2.voice();

var cat3 = new HomeCat("Rocky", "Stambul");
cat3.voice();