Adding a method

function main(){
  //create the critter
  var critter = new Object();

  //add some properties
  critter.name = "Milo";
  critter.age = 5;

  //create a method
  critter.talk = function(){
    msg = "Hi! My name is " + this.name;
    msg += " and I'm " + this.age;
    alert(msg);
  } // end method

  // call the talk method
  critter.talk();

} // end main