Re: [Moo] Change object's class dynamically

[Matthew Hazlett]

Sound like you want to 'Extends' the class.

var TreeNode = new Class({
Extends: CompositeTreeNode,
...
...
...
});

http://mootools.net/docs/core/Class/Class

you can also look at

http://mootools.net/docs/core/Core/Core#Type:extend