client side module pattern exmaple

index.js

// assuming you have $ defined
var $ = jqueryblablah

// way 1
function addFunctions(global) {
  function a() {}
  function b() {}
  global.a = a
  global.b = b
}

// way 2
function addFunctions(global) {
  global.a = function() {}
  global.b = function() {}
}
addFunctions($)

// way 3
(function addFunctions(global) {
  global.a = function() {}
  global.b = function() {}
})($)

// lets you do this:
$.a()
$.b()