How can I style google map's pop up window?

Hello;

How can I style google map's pop up window?

For example here in this page. If you click on show map, and then click on an icon you see the pop up window. But the border and the frame seem to be unchangeable! What can I do?

Please advice thank you.

what do you mean with they seem to be unchangeable. They just used a wrapper div (around the iframe) and styled it with css (inline though). nothing fancy going on there