Map with text linked

I´m designing a small company site, its my favourite experience, and i would like to know what is the simplest way to make the following:

I want to put a map in a page (the map already is made of several images) and when someone put the mouse in the top of a region it shows in other part of the page a certain text. in this case the distributors in that zone.

I thank u all for the attention.

Merry Xmas,

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