person1 = new Object();
person1.firstName = " Frodo ";
person2 = new Object();
person2.firstName = " Zarg ";
var tt = function(e) {document.write(e+this.firstName + "<->" + firstName);}
person1.sayName = tt;
person2.sayName = tt;
person1.sayName(" 1");
(person2.sayName)(" 2");
var firstName = "MainLine";
tt(" 3");