Set start page depending on screen width [closed]

Question

I'm building a responsive theme and would like to have different start pages depending on screen width.

In this case, the start page is set in WP admin and contains an image map built on a cunstom page template. On mobilde devices this image map doesn't work so well, so I'd like set one of the other pages as start page.

I guess I can merge front-template with standard-template and somehow achieve this with media queries, but would prefer a javascrip/jQuery solution.

Thanks