Extending Classes in Javascript (Prototypal pattern)

extendClass

function ClassName(name) {
    this.name = name;
}
ClassName.prototype = {
    constructor: ClassName,
    greet: function () {
        return 'My name is' + this.name;
    }
};

function SubClassName(name, stuff) {
    ClassName.call(this, name); // call the super class constructor
    this.stuff = stuff;
}
SubClassName.prototype = new ClassName(); // inherit the prototype
SubClassName.prototype.constructor = SubClassName; // set our constructor