How to disable vtour control bar only for mobile users via JavaScript

Dear krpano enthusiasts,

In my vtour, I'd like that mobile users do NOT see the control bar and that non-mobile users do see it.
Suppose that I want to do this via javascript (thus the JS variable 'ismobile' tells me if a user is mobile or not) and that for both mobile and non-mobile users I load the same xml file.

How can I achieve that?
How can I disable the control bar for mobile users?

Thanks.

A related question is : Removing bottom control bar

Thanks Umalo. Though it does not seem to work. At least on my Desktop I don't see the control bar (even if I replace 'Normal' with 'Desktop').
Actually you mention something I was not aware of: the "if" tag and the condition. What does === mean? Where can I find a documentation for this type of conditions that I'd like to learn about?

It seems to work like this, thanks (again)!