How can I highlight/cover a region or multiple regions with different colors (for example 3 US states), using google maps polygon arrays? I found a tuto on google code about how to draw a polygon but it's not giving detailed information.
Thank you for your help.
This documentation on Google is about as straight forward as you can get.
http://code.google.com/apis/maps/documentation/javascript/overlays.html
View the source of this page. Copy and paste the code into your own page and start from there.
http://code.google.com/apis/maps/documentation/javascript/examples/polygon-simple.html
In the example above you simply need to make more than one instance of bermudaTriangle and name it something else and add it to the map.
来源：https://stackoverflow.com/questions/6431855/how-to-highlight-a-region-on-google-maps