implicitbinding2.js

var InventoryDetails = function(obj){
  obj.GetInventoryDetails = function(){
    console.log("You are "+this.name+ " and you have "+ this.pencils + " pencils and "+ this.pens+ " pens."); 
  }
}

var JackInventory = {
  name:"Jack",
  pencils:264,
  pens:23
}
var DonInventory = {
  name:"Don",
  pencils:361,
  pens:68
}
InventoryDetails(JackInventory);
InventoryDetails(DonInventory)
JackInventory.GetInventoryDetails();
DonInventory.GetInventoryDetails();

// => You are Jack and you have 264 pencils and 23 pens.
// => You are Don and you have 361 pencils and 68 pens.