inheritance JS

function inherit(child, parent) {
  var Temp = function () {};
  Temp.prototype = parent.prototype;
  child.prototype = new Temp();
}

inherit(F2, F);

function inherit(child, parent) {
child.prototype = Object.create(parent.prototype);
}

function inherit(child, parent) {
child.prototype = Object.create(parent.prototype);
child.parent = parent;
}
F2.parent.prototype.setName.call(this, name);