Reflection

        <pre data-sub="prettyprint:_">
        var g = new Demo.Trees.GrannySmith();
        var gt = Demo.Trees.GrannySmith;
        var a = new Array(
        Demo.Trees.Apple,
        Demo.Trees.Tree,
        Demo.Trees.Pine,
        Demo.Trees.IFruitTree,
        Sys.IContainer);

        function OnButton1Click()
        {
        for (var i = 0; i < a.length; i ++)
        {
        if (a[i].isInstanceOfType(g))
        {
        alert(gt.getName() + " is a " + a[i].getName() + ".");
        }
        else alert(gt.getName() + " is not a " + a[i].getName() + ".");
        }
        }

        function OnButton2Click()
        {
        for (var i = 0; i < a.length; i ++)
        {
        if (gt.inheritsFrom(a[i]))
        {
        alert(gt.getName() + " inherits from " + a[i].getName() + ".");
        }
        else alert(gt.getName() + " does not inherit from " + a[i].getName() + ".");
        }
        }

        function OnButton3Click()
        {
        for (var i = 0; i < a.length; i ++)
        {
        if (Type.isInterface(a[i]))
        {
        if (gt.implementsInterface(a[i]))
        {
        alert(gt.getName() + " implements the " + a[i].getName() + " interface.");
        }
        else alert(gt.getName() + " does not implement the " + a[i].getName() + " interface.");
        }
        else alert(a[i].getName() + " is not an interface.");
        }
        }

        </pre>