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HTML

Example of JavaScript OOP, as seen in: 
<a href="http://javascriptissexy.com/oop-in-javascript-what-you-need-to-know/">javascriptissexy</a> and 
<a href="http://stackoverflow.com/questions/18188083/javascript-oop-in-nodejs-how">stackoverflow</a>
<br/>
Check the console.

JavaScript

//http://javascriptissexy.com/oop-in-javascript-what-you-need-to-know/
function inheritPrototype(childObject, parentObject) {
    var copyOfParent = Object.create(parentObject.prototype)
    copyOfParent.constructor = childObject
    childObject.prototype = copyOfParent
}

//example
function Canvas (id) {
    this.id = id
    this.shapes = {} //instead of array?
    console.log("Canvas constructor called "+id)
}
Canvas.prototype = {
    constructor: Canvas
    , getId: function() {
        return this.id
    }
    , getShape: function(shapeId) {
        return this.shapes[shapeId]
    }
    , getShapes: function() {
        return this.shapes
    }
    , addShape: function (shape)  {
        this.shapes[shape.getId()] = shape
    }
    , removeShape: function (shapeId)  {
        var shape = this.shapes[shapeId]
        if (shape)
            delete this.shapes[shapeId]
        return shape
    }
}

function Shape(id) {
    this.id = id
    this.size = { width: 0, height: 0 }
    console.log("Shape constructor called "+id)
}
Shape.prototype = {
    constructor: Shape
    , getId: function() {
        return this.id
    }
    , getSize: function() {
        return this.size
    }
    , setSize: function (size)  {
        this.size = size
    }
}

//inheritance
function Square(id, otherSuff) {
    Shape.call(this, id) //same as Shape.prototype.constructor.apply( this, arguments ); ?
    this.stuff = otherSuff
    console.log("Square constructor called "+id)
}
inheritPrototype(Square, Shape)
Square.prototype.getSize = function() { //override
    return this.size.width
}

function ComplexShape(id) {
    Shape.call(this, id)
    this.frame = null
    console.log("ComplexShape constructor called "+id)
}
inheritPrototype(ComplexShape, Shape)
ComplexShape.prototype.getFrame = function() {
    return this.frame
}
ComplexShape.prototype.setFrame = function(frame) {
    this.frame = frame
}

function Frame(id) {
    this.id = id
    this.length = 0
}
Frame.prototype = {
   ...