Google Maps API transport distance calculator needed

BEING RE-LISTED DUE TO TIMEWASTER... Need to add a "Nearest Transport" link functionality to my clients website. User will click on "Transport" button and it will show a Google map of where the property is and where the nearest tube / train stations are. There will also be a table underneath showing the distances. It must work like the foxtons property website, but with Google maps. See this link and then click on Transport to see how theirs works: [login to view URL] Website to add this to: [login to view URL] There will be another Button called "Transport" next to the other items at the bottom, which the user will click on and another window opens with the transport information. I need to be able to easily pass in the postcode dynamically from the database and the code will work out nearest stations, show the property on the map, the stations on the map and the distance calculationson the right side in a table. I have all the London tube station postcodes, and so the website will calculate the distances from the property postcode to the nearest 5 tube station postcodes. The website is written in Coldfusion so this must use Javascript from the Google maps API only. If any programming loops are required, I can add these in Coldfusion easily. Need this done fairly quickly please.