Contact page in joomla

I need to design contact us page of my joomla website, something like this website [login to view URL][dot]com/htm/[login to view URL] Idea is same, I want better graphical world map where i want to display my offices around the world. It should be same like above site, means if one of our office is in china and we hover mouse over china, our china full address is displayed on one side. It should be configurable for further use. Which means, if in future we open a new office or close any existing one, we can edit it.