file.js

// Basic closure, assumes window === this
(function(){
	// require stuff here
})();



// Custom closure, this === anything you want
(function(){
	// require stuff here
}).apply(this.global || this);



// Custom closure fn, no call. Load the code in one context and then execute it in another
function Moo(){
	// require stuff here
};
Moo.apply(this);
Moo.apply(context1);
Moo.apply(context2);
Moo.apply(context3);