function getTopMostWindow() {
			if (windows.length) {
				return windows[windows.length - 1];
			}
		}
This class handles the creation of native windows and dialogs. This class can be extended to provide for example inline dialogs.

@class tinymce.WindowManager
@example
// Opens a new dialog with the file.htm file and the size 320x240
// It also adds a custom parameter this can be retrieved by using tinyMCEPopup.getWindowArg inside the dialog.
tinymce.activeEditor.windowManager.open({
   url: 'file.htm',
   width: 320,
   height: 240
}, {
   custom_param: 1
});

// Displays an alert box using the active editors window manager instance
tinymce.activeEditor.windowManager.alert('Hello world!');

// Displays an confirm box and an alert message will be displayed depending on what you choose in the confirm
tinymce.activeEditor.windowManager.confirm("Do you want to do something", function(s) {
   if (s)
      tinymce.activeEditor.windowManager.alert("Ok");
   else
      tinymce.activeEditor.windowManager.alert("Cancel");
});