Simple object fire based on document body ID (Simplified version from Paul Irish)

app.js

var APP = APP || {};

APP.fire = {
  init : function () {

  },
  index : function () {

  },
  finalize : function() {
    
  }
}
/ 
$(document).ready(function($){
  var namespace  = APP.fire, context = document.body.id;
  if (typeof namespace.init === 'function') namespace.init();
  if(namespace && namespace[ context ] && (typeof namespace[ context ] === 'function')) namespace[ context ]();
  if (typeof namespace.finalize === 'function') namespace.finalize();
});