alert("Your request has succeded!");
$.globalMessenger().post "Your request has succeded!" alert = $.globalMessenger().post
Each time you call globalMessenger() it gets a chance to do some checking to make sure it's at the right place on the page and has the right classes, but if you're not doing anything fancy (like injecting it into a page which keeps getting rewritten), this should be fine.
It seems like overkill for a function that's (mainly) used to debugging.
For debugging, you should probably use console.log.
alert = (args...) -> $globalMessenger().post args...