title: Interactive button on a floor map
body: <p>I'm trying to search information about how to create an interactive floor map  (I think I could use a blueprint as a background image) with interactive buttons in some specific areas (in the meeting rooms) that change the colour depending on their availability.
  The room's availability will be checked with an HTTP POST to a service that I will create but my main problem is that I don't find any information about how to create those buttons on the image. I would like that those buttons show a small text box with some information about the rooms, meetings info, etc.
  Could somebody recommend me any documentation, guide, tutorial o whatever? Maybe are there some js libraries that I could use.</p>
  
  <p>Thank you very much for your help! </p>