Defining the object methods outside of the factory functions and then pointing to them : Member Function « Object Oriented « JavaScript Tutorial

1. JavaScript Tutorial
2. Object Oriented
3. Member Function

function showColor() {
    alert(this.color);
}

function createObject(sColor, iDoors) {
    var bufObject = new Object;
    bufObject.color = sColor;
    bufObject.doors = iDoors;
    bufObject.showColor = showColor;
    return bufObject;
}

var myHourse1 = createObject("red", 4);
var myHourse2 = createObject("blue",3);
myHourse1.showColor();
myHourse2.showColor();