var rectangle = {
    upperLeft : { x : 2, y : 2 },
    lowerRight : { x : 4, y : 4},
    method1 : function(val) { this.upperLeft.x = val.prop; }
}

function f() {
    var foo = new Foo(3.5, 50);
    foo.prop = foo.modify(44);
    foo.print(22);
    foo.getObject(rectangle);
}

f();