How to switch theme and stay on the same page/node ?

Hi,
I'm able to switch theme based on regular links set on both the mobile/desktop themes.

e.g: www.mysite.com?theme=mobile, www.mysite.com?theme=desktop my question is How do i use these url links to switch the themes, yet to stay on the same page while doing so and not being redirected to fronpage? (pass the current node location dynamically)

BR
Itzhak