<script>
 name ="maxime"
otherName = "yugi-ho"

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

Person.prototype.greet = function(otherName){
  return "Hi " + otherName + ", my name is " + name;
}

var maxime = new Person("maxime"); //la variable maxime est une instance de Person.
console.log(maxime.greet(otherName)) //On dis a maxime de saluer otherName
        //Tada
</script>