[Plugin: NextGen] How to turn off thickbox on mobile phone

Hello,

I’m working on mobile version of my site and i use media-queries. So my deskop and mobile version have the same html/php code.

I would like to turn off thickbox effect on mobile version, becouse when I click on a image the zoom looks smaller than image which I clicked. And I don’t know how to do it. In my code I have:

...<li><a class="thickbox"><img /></a></li> ...