javascript obfuscation

Hello,
i searched the forum about javascript obfuscation and could not find any answer that's why i post my question as a new topic. I know that it's not too professional but need to know if that will work: When obfuscating the RunnerBase.js , RunnerControls.js and other js files will the ready built application work? I want to do this first to optimize the code a little bit (save bandwidth) and hide away the prying eyes of novice users?
May i do so to accomplish that? I first ask because i do not want to spend and waste any time if that is not possible to be accomplished?
p.s. any feedback, advice would be highly appreciated how to make harder reading the js files.
thanks in advance.