custom script loader

core.js

(function (global) {
var _namespace = global.namespace
  , namespace = {};

namespace.push = function push (fn) {
  return fn && typeof fn === 'function' && fn(namespace);
};

if (_namespace && _namespace.length) {
  var i = _namespace.length;
  while (i--) namespace.push(_namespace[i]);
}
}(this))

loader.js

(function (a, b, c, d, e, f){
  for (d = c.length, f = a.getElementsByTagName(b)[0]; d--;) {
    e = a.createElement(b);
    e.src = c[d];
    f.parentNode.insertBefore(e, f);
  }
})(
    document
  , 'script'
  , [
        'http://cdn.example.com/core.js'
      , 'http://cdn2.example.org/page.js'
   ]
)

page.js

('namespace' in this ? namespace : (namespace = [])).push(function push (namespace) {

});

nice