Javascript Inheritance with Atlas/Ajax

One of the features in Atlas is that some new features are available in javascript.  These are things like inheritance, interfaces, namespaces, and other things.  One of the things that I was having a devil of a time upgrading to the March CTP was my javascript inheritance/interface code.  The problem was that pre-March CTP, this code used to be

Type.registerClass('classname',......);

Now, with the March CTP, you need to say

classname.registerClass('classname',.......);