code: function(script)
  	{
  		// create local undefined vars so that script cannot access private vars
  		var _namespaces = undefined;
  		var _imported = undefined;
  		var _loading = undefined;
  		var _classPaths = undefined;
  		var _classInfo = undefined;
  		var _classDependencyList = undefined;
  		var _mixinCount = undefined;
  		var _mixinDependencies = undefined;
  		var _evalScript = undefined;
  		var _appendConstructor = undefined;
  
  		// set arguments to undefined so that script cannot access
  		arguments = undefined;
  
  		// eval script in context of window
  		eval.call(window, script);
  	}
docs: Private Functions 
  Function for evaluating dynamically loaded scripts.