create multiple windows from reusable function

window factory

var ns = {};

(function(){
  ns.ui = {};
  
  ns.ui.createNewWindow = function(url){
    return Ti.UI.createWindow({url:url});
  }

  ns.ui.createBaseWindow = function(_args) {
    var win = Ti.UI.createWindow({title:_args.title});

    win.add(Ti.UI.createLabel({
    	color: '#576996',
    	height: 20,
    	textAlign: 'center',
    	top: 15,
      text: 'Window 1'
    }));

    var aButton = Titanium.UI.createButton({
    	title: 'Open new window!',
    	width: 100,
    	height: 35,
    	top: 100,
    	url: 'file/to/open.js'
    });
    aButton.addEventListener('click', function (e) {
      var url = e.source.url;
      var win = ns.ui.createNewWindow(url);
      win.open();
    });
    win.add(aButton);

    return win;
  };
})();