var Foo = function (a)
{
	this.a = a
}
Foo.prototype =
{
	helloFoo: function ()
	{
		console.log('Foo: a =', this.a)
	}
}

var Bar = function (a, b)
{
	Foo.call(this, a)
	this.b = b
}
Bar.prototype = $.extend(
{
	helloBar: function ()
	{
		console.log('Bar: a =', this.a, ', b =', this.b)
	}
}, Foo)

var bar = new Bar(23, 'skidoo')
bar.helloFoo()
bar.helloBar()

// Foo: a = 23
// Bar: a = 23 , b = skidoo