I would prefer using the Customer.prototype. ... way, since this creates a prototype, and every customer object than refers to that prototype. While your practice isn't a problem in simple, small websites, you can get memory problems if you use this too much.

But apart from that, great introduction, cheers!

[Coding oversight]

At the begining you point out the difference between:

alert(custFunc);

and

alert(custObj);

But you didn't point out that custFunc === custObj() or why custFunc != custObj. It would be good for javascript beginners to know why. The difference is that one is a string object and the other is the customer object

[Poor Memory Management]

You demonstrate a bad practice in javascript and make an incorrect assumption about internal/external methods. You declared that:

function myFunct(){

}

was equivelant to

var myObj = function(){

this.myEIntFunct = MyFunct(){

}

}

This is incorrect. MyFunct exists in the global Dom space and then you assign a varible object inside the class object. This functionality is now in two places in Dom space. To prevent this duplication you utilize the prototype method which is built into every object.

myObj.prototype.myEIntFunct = MyFunct;

Now the only location that MyFunct method exists in is at the global DOM space. While this does not change the output, it does prevent exessive memory use, and keeps the method available to all instances of the class object.

Though this applies for objects that will be created in mass volume. A more common approach to creating internal methods and properties you did outline well. Another mistake that is made and is included in your code is the missing semicolon at the end of internal method declarations.

var MyObj = function()

{

this.MyPubInt = 1;

var MyPriInt = 3;

this.MyPubMeth = function(){

}; //semicolon ends an internal function declaration

var MyPriMeth = function(){

}; //semicolon ends an internal function declaration

function MyOtherPriMeth(){

} //Acceptable,

//It is recommended that you use the previous delaration style

}