Static Skins in prototype

Hi List!

Is it possible to have static skins of prototypes?
I have the name of a Prototype and want to render an add-Form. So i 
tought it would be nice if i could do something like this:

var protoName = "myProto";
global[protoName].renderSkin("add");

Is there a way to achieve this?


thanks in advance,
Anton