Define Global Variables in UI5 JS files?

Hi all

How do I define Global variables in the UI5 JS files generated by the eclipse tool? I wanted some variable which can be used across the JS view and the controller file, or atleast within the same JS view file, different methods

I added few variable just below the view controller, but it ran into lot of error

e.g.

sap.ui.jsview( poc.Initial", {
/** Specifies the Controller belonging to this View. 
* In the case that it is not implemented, or that "null" is returned, this View does not have a Controller.
* @memberOf poc.Initial// Some Global Variables
var aContent = {};
var aControls = [];
var Matlayout = new c.layout.MatrixLayout({width:"auto"}),
 getControllerName : function() { 
return "poc.Initial";
 },