I agree with the above comment. Running multiple Google maps does not work. However, you can have multiple maps visible, so long as only one is active at a time. What you do is:
- Capture and optimize a screen shot of each map.
- Decide which one (if any) will be the default map. Note: Your initial page load is faster if none are active by default!
- Display the default map (if any) and use the static images of the others as graphical anchors to animate the respective map.