function Class_Bar()
{
    this.panel = null;

    this.init = function ()
    {
        // do some stuff
        this.panel = 20;
    }

    this.apply = function ()
    {
        alert(Bar == this);
        Bar.x();
        this.x();
    }

    this.x = function()
    {
        alert("Some friendly message");
        alert(Bar.panel);
    }
}

var Bar = new Class_Bar();

function Class_Factory()
{
    this.factories = new Array();

    this.add = function (init, apply)
    {
        this.factories.push({"init":init, "apply":apply});
    }

    this.init = function ()
    {
        for (var i = 0; i < this.factories.length; ++i)
        {
            this.factories[i]["init"]();
        }
    }

    this.apply = function ()
    {
        for (var i = 0; i < this.factories.length; ++i)
        {
            this.factories[i]["apply"]();
        }
    }
}

var Factory = new Class_Factory();

function main()
{
    // Case 1
    Factory.add(Bar.init, Bar.apply);

    Factory.init();
    Factory.apply();

    // Case 2
    Bar.init();
    Bar.apply();
}

main();