methodinvoc.js

var add = function(a,b){
  console.log(this.value)
  return a+b;
};

var methodInvoc = {
    value : 0,
    myadd : add //reference to global add method
}

methodInvoc.value = methodInvoc.myadd(5,6) //call the method defined on the object
console.log(methodInvoc.value)