var Klass = function() {};
Klass.extendClass = (function() {
  var F = function() {};
  return function(C, P) {
    F.prototype = P.prototype;
    C.prototype = new F();
    C.uper = P.prototype;
    C.prototype.constructor = C;
  };
})();
Klass.extend = function(props) {
  var _slice = Array.prototype.slice;
  var Glass = function() {
    /*if (Glass.uper && Glass.uper.hasOwnProperty("init")) {
      Glass.uper.init.apply(this, _slice.call(arguments))
    }*/
    if (Glass.prototype.hasOwnProperty("init")) {
      Glass.prototype.init.apply(this, _slice.call(arguments));
    }
  };
  Klass.extendClass(Glass, this);
  Glass.extend = this.extend;
  for (var key in props) {
    if (props.hasOwnProperty(key)) {
      Glass.prototype[key] = props[key];
    }
  }
  return Glass;
};

var A = Klass.extend({
    init: function(name) {
      this.name = name;
      console.log('A constructor is running!');
    },
    getName: function() {
      return this.name;
    }
});
var B = A.extend({
    init: function(name) {
      this.name = name;
      console.log('B constructor is running!');
    },
    getName: function() {
      return this.name;
    },
    a: 'b'
});
var C = B.extend({
    init: function(name) {
      console.log('C constructor is running!');
    },
    c: 'c',
    getName: function() {
      var name = C.uper.getName.call(this);
      return 'Hi, I\'m' + this.name;
    }
});
var c1 = new C('zlf');
console.log(c1.getName());