[Edge]

Gaben that's a lot of code for something that only needs a Shunting Yard =] It's actually pretty smart because Flash/AS3 doesn't have "eval" anymore so in order to "run" their little challenge you need to be an actual browser to accept it in an ExternalInterface call... Or, well, you don't *need* to as just shown =] I have a different way of solving it that's less elegant but also less code.

E.