gmapAPI_v3: <script src="https://maps.googleapis.com/maps/api/js?v=3.exp&libraries=places"></script>

This contains 5 codes:
1. Basic
2. Using Ajax to grab Latt and Lang value.
3. Using customize marker to display custom infoWindow
4. Show multiple places with (2) and (3)
5. Complex sample.

All codes written based on Tutorial in official site:
https://developers.google.com/maps/
https://developers.google.com/maps/tutorials/

you can copy for free (personal use or commercial).

Best Regards, January 27th, 2016. Magelang - Indonesia
Herman Nz