Using the Google Maps API to Get Locations from Zip Code (Postal Code) and the house 

Using the Google Maps API to Get Locations from Zip Code (Postal Code) and the house 

  
Hello,
I need to display on the pop up all addresses by Zip Code (use Google API) to select right address.
The questions:
1. What is Google Map APi I should use?
2. How add javascript to my web block.
Thanks