I\'m struggling to find any up to date relevant information on how to achieve this effect in google maps. I was hoping someone knows more than me on the subject and could point
This code will tell you the single closest zipcode to the one you enter in the box. I'm sure from here you can adapt it to give the top 5 results.
I was able to adapt the Geocoding sample code:
Google Maps JavaScript API v3 Example: Geocoding Simple