Convert 20 lines of Action Script 2 code to work in Action Script 3

I am trying to have some action script code that was written a while ago converted to action script 3. Although, the code could be enhanced. We are trying to make it so it will automatically detect what type of RSS it's going to read and then determine what to do with it from there. An example can be see here: <[login to view URL]> It's pretty straight forward.