JavaScript Multiple Inheritence

gistfile1.js

var Mom = function () {
 this.skill = 'smart'; 
}

var Dad = function () {
  this.interest = 'soccer'
}

Dad.prototype.getNickname = function () {
  return 'the man';
}

var Kid = function () {
  Mom.apply(this);
  Dad.apply(this);
}

_.extend(Kid.prototype, Mom.prototype);
_.extend(Kid.prototype, Dad.prototype);