Extending my Javascript Library

So essentially this is my current library setup

var myLib = function(e){
	this.version=0.4;
	this.e=e;
	this.css = function(){
		
	};
	if(this instanceof myLib)
		return this.myLib;
	else
		return new myLib(e);
}

Code (markup):

But its getting too big and I'm wanting to put other functions in other files.
E.g this is myLib.js but then I want say another file called myLib_ajax.js which still uses the myLib global variable.

How would i be able to do this and is it possible with my current setup?

 

Sure you can, extend the prototype chain of myLib to ajax object.

 

Just the answer I was looking for thanks!!