call javascript object function

Question

I have two objects of the same type.

function myObject(){
this.a = 1;
this.b = 1;
function changeA(){//some code};
function changeB(){//some code};
}
var obj1 = new myObject();
var obj2 = new myObject();

How can I make a call to obj2.changeB() from external code, another function or another object (e.g. obj1) ?

• adeneo: You can't, the functions are local and not part of the myObject
• Bergi: A local function is not a method.

Answer 1

obj2.changeB() doesn't exist.

You need to assign a property on your object, not create a local variable:

this.changeB = function() { ... };

Answer 2

Just create a properties in you object like:

function myObject(){
this.a = 1;
this.b = 1;
this.functionA = function changeA(){//some code
 alert('im 1');
};
this.functionb = function changeB(){//some code
alert('im 2');};
}

and call the function obj2.functionb();

LIVE DEMO

Answer 3

You have to do something like that:

var myObject = function(){
var protectedValue1 = ‘variable’;
var protectedValue2 = ‘variable’;
var changeA = function(){
alert(protectedValue);
}
var changeB = function(){
alert(protectedValue);
}
}
var object1 = new myObject();
var object2 = new myObject();
//
object2.changeB();